FLANGED CONNECTIONS OF WELLHEAD EQUIPMENT TYPES,

MAIN PARAMETERS AND DIMENSIONS

GOST 28919-91

USSR STATE COMMITTEE FOR PRODUCT QUALITY MANAGEMENT AND STANDARDS Moscow 1991 STATE STANDARD OF THE UNION OF THE USSR

This standard applies to flange connections with steel ring gaskets of octagonal cross-section, intended for connecting components of wellhead oilfield equipment for operating pressure from 14 to 140 MPa and conditional passage from 50 to 680 mm, as well as on flanges, gaskets, studs and nuts flange connections. The requirements of the standard are mandatory, except for the requirements of paragraphs. 1.1, 1.4 regarding the indicator “Stud length”, paragraphs. 1.3. 1.6 in terms of the indicator “Weight, kg”, which are recommended.

1. TYPES, PARAMETERS AND SIZES

1.1. Two types of flange connections are installed:

1 - with a gap between the ends of the flanges;

2 - without a gap between the ends of the flanges.

For each type of flange connection, two connection options are provided: flange to flange and flange to body (i.e., connecting a flange to a flange combined with a body). Types, options and basic parameters of flange connections must correspond to those indicated in the drawing. 1 and in table. 1.

Types of flange connections

1.2. The standard provides 2 flange versions:

version 1 - for flange connections type 1 (Fig. 2);

version 2 - for flange connections type 2 (Fig. 3).

The flange parameters must correspond to those indicated in the table. 2 and 3. 1.3.

The standard provides for two versions of gaskets:

P - for flange connections type 1 (Fig. 4);

BH - for flange connections type 2 (Fig. 5).

* f1max = f; f1min = 3 mm. Allowed for flanges combined with the body, f1 = 0.

** For flanges with an outer diameter of no more than 315 mm, the parallelism tolerance is 0.2/100.

The design, dimensions, weight and applicability of gaskets must correspond to the following versions:

P - damn. 4 and table. 4;

BH - damn. 5 and table. 5.

1.4. The standard provides for two versions of studs:

version 1 - for parts with smooth holes;

version 2 - with screwed end.

The design, dimensions and applicability of the studs must correspond to those indicated in the drawing. 6 and in table. 2 and 3.

d - diameter of the stud thread in accordance with table. 2 or 3;

l = 2d; l1 = 1.25 for threads from M16 to M30 inclusive; l1 = d for M33 and more;

d1 - according to GOST 19256 or GOST 19258; L - stud length in accordance with table. 2 or 3.

L = L1 for flange-to-flange connection or L = L2 for flange-to-body connection.

It is allowed to manufacture studs of execution 1 in accordance with GOST 22042, execution 2 - in accordance with GOST 22034 (for nominal thread diameters up to 30 mm)

and according to GOST 22032 (for nominal thread diameters over 30 mm).

Studs of version 1 can be manufactured with threads along the entire length.

1.5. The design, dimensions and application of nuts must correspond to those indicated in the drawing. 7 and in table. 6 and 7

1.6. Technical requirements for gaskets, studs and nuts - according to Appendix 1.

1.7. Acceptance rules, test methods, marking and packaging of gaskets, nuts and studs - in accordance with the regulatory and technical documentation for the corresponding wellhead equipment.

1.8. Symbols for flanges, gaskets, studs and nuts - according to Appendix 2.

TECHNICAL REQUIREMENTS FOR CONNECTING PARTS OF FLANGED CONNECTIONS

1. Technical requirements for gaskets

1.1. Gaskets must be made only from solid pieces.

1.2. The hardness of the material for the manufacture of ring gaskets should be no more than:

carbon steel - 107 НВ;

high-quality steel - 131 НВ;

carbon steel - 160 HB.

Notes:

1. Gaskets U1 and U2 are intended for non-corrosion-resistant equipment.

2. K1 gaskets are intended for equipment operating in a well environment with a volumetric CO2 content of up to 6%; K3 gaskets are intended for equipment operating in a well environment with a volumetric content of CO2 and H2S up to 25%.

1.3. The difference in hardness between the material of gaskets and flanges or the surface of flange grooves in contact with gaskets must be at least 50 Brinell units, unless a different standard is specified in the regulatory and technical documentation for the product.

1.4. Gaskets made of non-alloy steels must be coated. Type of coating - cadmium or zinc according to GOST 9.301.

Coating thickness - 5-13 microns. 1.5. The sealing surfaces of the gaskets must be free of corrosion, dirt, nicks, scratches, dents and other defects.

2. TECHNICAL REQUIREMENTS FOR FLANGE CONNECTION STUDS

2.1. Studs should be made from rolled bars or forgings.

2.2. The mechanical properties of the material of blanks or finished studs in a heat-treated state must correspond to those indicated in Table 9.

For equipment of the HL and UHL versions in accordance with GOST 15150, the value of the impact strength of the stud material after heat treatment must be no lower than KCV 20 J/cm2 at a temperature of minus 60°C. Impact strength is checked when choosing a material and heat treatment mode.

2.3. Metric thread - according to GOST 24705 with a tolerance range of 6 g according to GOST 16093, normal thread run-out - according to GOST 27148; It is recommended to make the thread with a rounded cavity - in accordance with GOST 9150.

2.4. The studs must be coated. Type of coating - cadmium with chromating according to GOST 9.301. Coating thickness - 9-12 microns. By agreement with the consumer, another type of metal coating is allowed.

2.5. Protective coatings must be uniform; bubbles and peeling are not allowed.

2.6. Requirements for the roughness of treated surfaces for coatings are in accordance with GOST 9.301.

2.7. The remaining technical requirements are in accordance with the regulatory and technical documentation for equipment equipped with studs.

3. TECHNICAL REQUIREMENTS FOR NUTS

3.1. The nut should be made from long and calibrated rolled products, forgings or stampings.

3.2. The mechanical properties of the nuts must correspond to those indicated in the table. 10.

The test load voltage is checked when selecting materials and heat treatments. Test method - in accordance with GOST 1759.5.

3.3. Metric thread in accordance with GOST 24705 with a tolerance range of 6N in accordance with GOST 16093, normal thread run-out in accordance with GOST 27148, the shape of the thread recesses is recommended with rounding in accordance with GOST 9150.

3.4. Nuts must be manufactured with a coating. Type of coating - cadmium with chromating according to GOST 9.301. Coating thickness - 9-12 microns. By agreement with the consumer, another type of metal coating is allowed. In these cases, is added to the nut symbol.

3.5. Protective coatings must be uniform, bubbles and peeling are not allowed.

3.6. Requirements for the roughness of treated surfaces for coatings are in accordance with GOST 9.301.

3.7. The remaining technical requirements are in accordance with the regulatory and technical documentation for equipment equipped with nuts.

APPENDIX 2 Mandatory

SYMBOLS OF FLANGE CONNECTIONS AND THEIR COMPONENTS

1. In the technical documentation for wellhead equipment, when specifying the connecting dimensions of flanges, their symbol should be given. The symbol for flanges (flange connections) must consist of the word “Flange”, the designation of the flange in accordance with Table. 2 and 3 and symbols of this standard. Examples of designation of flanges (flange connections) in the design documentation are shown in Fig. 8.

2. The symbol of the gasket must consist of the word “Gasket”, a code consisting of the designation of the gasket in accordance with Table. 4 and 5, designations of gasket material in accordance with table. 8, as well as designations of the regulatory and technical document for delivery.

Example symbol gaskets P35 made of steel 08kp GOST 1050:

Gasket P35 - U1 GOST 28919-91

3, The symbol of the stud should consist of the word “Stud”, a code constructed according to the diagram below, and the designation of the regulatory and technical document for delivery.

Execution in accordance with the drawing. 6

Thread diameter

Stud length

Designation of the type of coating according to GOST 1759.0

Coating thickness

An example of a designation for a stud, version 1, thread diameter M24 with a large thread pitch, length L = 150 mm, flange connection type 1 with cadmium

coating 10 microns thick:

Hairpin 1-M24´150-1-02.10 GOST 28919-91

4. The symbol of the nut must consist of the word “Nut”, a code constructed according to the diagram below, and the designation of the regulatory and technical document for delivery.

Thread diameter

Thread pitch (large pitch is not indicated)

Type of flange connection (according to clause 1.1 of this standard)

Designation of the type of coating according to GOST 1759.0

Coating thickness

An example of a symbol for a nut with a thread diameter of M36 with a fine thread pitch of 3 mm for a flange connection type 2 with cadmium coating and chromating

10 microns thick:

Nut M24´3-2-02.10 GOST 28919-91

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Heavy Engineering of the USSR DEVELOPERS N. G. Kurbanov; A. G. Dozortsev, Ph.D. tech. sciences; T. K. Believ, Ph.D. tech. sciences; B. O. Frenkel, Ph.D. tech. sciences; Kh. T. Kahramanov, Ph.D. tech. sciences; I. M. Nisenbaum

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Product Quality Management and Standards dated February 26, 1991 No. 178

3. Inspection period - 1996. Inspection frequency - 5 years.

4. INTRODUCED FOR THE FIRST 5. REFERENCED REGULATIVE AND TECHNICAL DOCUMENTS

Date of introduction 01.07.92

The requirements of the standard are mandatory, except for the requirements of paragraphs. 1.1, 1.4 regarding the indicator “Stud length”, paragraphs. 1.3. 1.6 in terms of the indicator “Weight, kg”, which are recommended.

You can order GOST 28919 91 flanges on our website by simply filling out the form below, and also read the detailed technical specifications. We sell other types of products of this and other standards, for example, flanges with surfacing GOST 28919. You can also find out the full list of products sold by contacting us by phone or by writing to the e-mail indicated at the top of the website.

1. TYPES, PARAMETERS AND SIZES

1.1. Two types of flange connections are installed:

1 - with a gap between the ends of the flanges;

2 - without a gap between the ends of the flanges.

For each type of flange connection, two connection options are provided: flange to flange and flange to body (i.e., connecting a flange to a flange combined with a body).

Types, options and basic parameters of flange connections must correspond to those indicated in the drawing. 1 and in table. 1.

Types of flange connections

Table 1

Conditional passage D y, mm	Flange connection type

	Working pressure R p, MPa	Gap between flanges, δ *, mm	Working pressure R p, MPa
		Gap between flanges, δ *, mm

*Size for reference.

Note. The "X" sign indicates that this combination of parameters is provided.

1.2. The standard provides 2 flange versions:

version 1 - for flange connections type 1 (Fig. 2);

version 2 - for flange connections type 2 (Fig. 3).

The flange parameters must correspond to those indicated in the table. 2 and 3.

1.3. The standard provides for two versions of gaskets:

P - for flange connections type 1 (Fig. 4);

BH - for flange connections type 2 (Fig. 5).

* f 1max = f; f 1min = 3 mm. Allowed for flanges combined with the body, f 1 = 0.

** For flanges with an outer diameter of no more than 315 mm, the parallelism tolerance is 0.2/100.

Table 4. Dimensions, mm

Gasket designation	Average diameter D	Height h	Width b	End width	Weight, kg, no more

Table 5. Dimensions, mm

Gasket designation	O.D D	End outer diameter D 1	Width b	End width b 1	Height h	Bypass Diameter d	Round radius R	Weight, kg, no more

The design, dimensions, weight and applicability of gaskets must correspond to the following versions:

P - damn. 4 and table. 4;

BH - damn. 5 and table. 5.

1.4. The standard provides for two versions of studs:

version 1 - for parts with smooth holes;

version 2 - with screwed end.

The design, dimensions and applicability of the studs must correspond to those indicated in the drawing. 6 and in table. 2 and 3.

d- thread diameter of the stud in accordance with table. 2 or 3;

l = 2d ;

l 1 = 1.25 for threads from M 16 to M30 inclusive; l 1 = d for M33 and more;

d 1 - according to GOST 19256 or GOST 19258;

L- length of the stud in accordance with table. 2 or 3.

L = L 1 for flange-to-flange connection or L = L 2 for flange-body connection.

It is allowed to manufacture studs of version 1 according to GOST 22042, version 2 - according to GOST 22034 (for nominal thread diameters up to 30 mm) and according to GOST 22032 (for nominal thread diameters more than 30 mm).

Studs of version 1 can be manufactured with threads along the entire length.

1.5. The design, dimensions and application of nuts must correspond to those indicated in the drawing. 7 and in table. 6 and 7.

*Dimensions for reference

1.6. Technical requirements for gaskets, studs and nuts - according to Appendix 1.

1.7. Acceptance rules, test methods, marking and packaging of gaskets, nuts and studs - in accordance with the regulatory and technical documentation for the corresponding wellhead equipment.

1.8. Symbols for flanges, gaskets, studs and nuts - according to Appendix 2.

Table 6. GOST 28919 91 nuts - parameters for flange connections type 1. Dimensions, mm

Nominal thread diameter d	Thread pitch	Key size S		Circumcircle diameter D, no less	Height N		Weight, kg	Applicability of nuts in type 1 flange connections
Nominal thread diameter d	Thread pitch		Prev. off	Circumcircle diameter D, no less		Prev. off	Weight, kg	Applicability of nuts in type 1 flange connections

								65´14; 80´14
								180 ´ 14; 50 ´ 21; 80 ´ 21; 50´35
								180 ´ 14; 65 ´ 21; 65´35
								230´14; 100 ´ 21; 180´21; 80´35
								100 ´ 35; 280´14; 350´14
								230´21; 280´21; 350´21

								540´14; 425´21 230´35

Table 7. GOST 28919 91 nuts - parameters for flange connections type 2. Dimensions, mm

Nominal thread diameter d	Thread pitch	Key size S		Circumcircle diameter D, no less		Limit displacement of the hole axis relative to the faces	Weight, kg	Suitable for type 2 flange connections
Nominal thread diameter d			Prev. off	Circumcircle diameter D, no less	Prev. glass	Limit displacement of the hole axis relative to the faces	Weight, kg	Suitable for type 2 flange connections

								65 ´ 70; 50 ´ 105
								80 ´ 70; 65 ´ 105
								80 ´ 105; 100 ´ 70; 50 ´ 140

								100 ´ 105; 80 ´ 140
								180 ´ 70; 180 ´ 105; 230´70

								100 ´ 140; 680´14; 280´70
								230 ´ 105; 425´35; 425´70; 350´70
								680´21; 180 ´ 140; 540´35; 280 ´ 105; 480´35
								480´70; 350´105
								540´70; 230 ´ 140

								480 ´ 105; 350 ´ 140

TECHNICAL REQUIREMENTS FOR CONNECTING PARTS OF FLANGED CONNECTIONS

1. Technical requirements for gaskets

1.1. Gaskets must be made only from solid pieces.

1.2. The hardness of the material for the manufacture of ring gaskets should be no more than:

carbon steel - 107 НВ;

high-quality steel - 131 НВ;

carbon steel - 160 HB.

Table 8.

Gasket material designation	Steel grade, standard designation	Brinell hardness, no more
	Steel 0 GOST 380
	St 08kp GOST 1050
	St 20 GOST 1050
	St 08 GOST 1050
	12 ´ 18N9T GOST 5632
	10 ´ 17N13M3T GOST 5632

Notes:

1. Gaskets U1 and U2 are intended for non-corrosion-resistant equipment.

1.3. The different hardness of the material of gaskets and flanges or the surface of the flange grooves in contact with the gaskets must be at least 50 Brinell units, unless a different standard is specified in the regulatory and technical documentation for the product.

1.4. Gaskets made of non-alloy steels must be coated.

Type of coating - cadmium or zinc according to GOST 9.301.

Coating thickness - 5-13 microns.

1.5. The sealing surfaces of the gaskets must be free of corrosion, dirt, nicks, scratches, dents and other defects.

2. GOST 28919 91 STUD FOR FLANGE CONNECTIONS - TECHNICAL REQUIREMENTS

2.1. GOST 28919 91 studs should be made from rolled sections or forgings.

2.2. The mechanical properties of the material of blanks or finished studs in a heat-treated state must correspond to those indicated in the table. 9.

Table 9.

Flange connection type	Yield strength, N/mm2	Tensile strength, N/mm	Elongation, %	Impact strength,
Flange connection type

2.4. The studs must be coated. Type of coating - cadmium with chromating according to GOST 9.301.

Coating thickness - 9-12 microns. By agreement with the consumer, another type of metal coating is allowed.

2.5. Protective coatings must be uniform; bubbles and peeling are not allowed.

2.6. Requirements for the roughness of treated surfaces for coatings are in accordance with GOST 9.301.

2.7. The remaining technical requirements are in accordance with the regulatory and technical documentation for equipment equipped with studs.

3. GOST 28919 91 NUT - TECHNICAL REQUIREMENTS

3.1. GOST 28919 91 nuts should be made from long and calibrated rolled products, forgings or stampings.

3.2. The mechanical properties of the nuts must correspond to those indicated in the table. 10.

Table 10.

The test load voltage is checked when selecting materials and heat treatments. Test method - in accordance with GOST 1759.5.

3.4. Nuts must be manufactured with a coating. Type of coating - cadmium with chromating according to GOST 9.301. Coating thickness - 9-12 microns.

By agreement with the consumer, another type of metal coating is allowed. In these cases, the designation of the type of coating in accordance with GOST 1759.0 is added to the symbol of the nut.

3.5. Protective coatings must be uniform, bubbles and peeling are not allowed.

3.6. Requirements for the roughness of treated surfaces for coatings are in accordance with GOST 9.301.

3.7. The remaining technical requirements are in accordance with the regulatory and technical documentation for equipment equipped with nuts.

APPENDIX 2 Mandatory

SYMBOLS OF FLANGE CONNECTIONS AND THEIR COMPONENTS

1. In the technical documentation for wellhead equipment, when specifying the connecting dimensions of flanges, their symbol should be given.

The symbol for flanges (flange connections) must consist of the word “Flange”, the designation of the flange in accordance with Table. 2 and 3 and symbols of this standard.

Examples of designation of flanges (flange connections) in the design documentation are shown in Fig. 8.

An example of a symbol for a P35 gasket made of steel 08kp GOST 1050:

Gasket P35 - U1 GOST 28919-91

3, The symbol of the stud should consist of the word “Stud”, a code constructed according to the diagram below, and the designation of the regulatory and technical document for delivery.

Execution in accordance with the drawing. 6

Thread diameter

Thread pitch (large pitch is not indicated)

Stud length

Type of flange connection (according to clause 1.1 of this standard)

Designation of the type of coating according to GOST 1759.0

Coating thickness

An example of a designation for a stud of version 1, thread diameter M24 with a large thread pitch, length L= 150 mm type 1 flange connection with 10 µm cadmium coating:

Hairpin 1-M24´150-1-02.10 GOST 28919-91

4. The symbol of the nut must consist of the word “Nut”, a code constructed according to the diagram below, and the designation of the regulatory and technical document for delivery.

INTERSTATE STANDARD

TYPES, MAIN PARAMETERS AND DIMENSIONS

Official publication

IPC PUBLISHING HOUSE OF STANDARDS Moscow

INTERSTATE STANDARD

FLANGED CONNECTIONS FOR WELLHEAD EQUIPMENT

Types, main parameters and sizes

Flange connections of wellhead equipment. Types, basic parameters and dimensions

GOST

28919-91

MKS 75.180.10 OKP 36 6000

Date of introduction 07/01/92

The requirements of the standard are mandatory, except for the requirements of paragraphs. 1.1, 1.4 regarding the indicator “Stud length”, paragraphs. 1.3, 1.6 in terms of the “Weight, kg” indicator, which are recommended.

1. TYPES, PARAMETERS AND SIZES

1.1. Two types of flange connections are installed:

1 - with a gap between the ends of the flanges;

2 - without a gap between the ends of the flanges.

For each type of flange connection, two connection options are provided: flange to flange and flange to body (i.e., connecting a flange to a flange combined with a body).

Types, options and basic parameters of flange connections must correspond to those indicated in the drawing. 1 and in table. 1.

Types of flange connections

Flange-flange Flange-body

Official publication

Reproduction is prohibited

Continuation of the table. 7

Dimensions, mm

Nominal thread diameter d	Thread pitch	Key size S	Weight, kg
Nominal thread diameter d			Weight, kg

				100 x 140; 680 x 14; 280 x 70
				230 x 105; 425 x 35; 425 x 70; 350 x 70
				680x21; 180 x 140; 540 x 35; 280 x 105; 480 x 35
				480 x 70; 350 x 105
				540 x 70; 230 x 140

				480 x 105; 350 x 140

1.6. Technical requirements for gaskets, studs and nuts - according to Appendix 1.

1.7. Acceptance rules, test methods, marking and packaging of gaskets, nuts and studs - in accordance with the regulatory and technical documentation for the corresponding wellhead equipment.

1.8. Symbols for flanges, gaskets, studs and nuts - according to Appendix 2.

GOST 28919-91 S. 11

TECHNICAL REQUIREMENTS FOR CONNECTING PARTS OF FLANGE JOINTS

1. Technical requirements for gaskets

1.1. Gaskets must be made only from solid pieces.

1.2. The hardness of the material for the manufacture of ring gaskets should be no more than:

Carbon steel - 107 НВ;

High-quality steel - 131 HB;

Carbon steel - 160 HB.

Table 8

Gasket material designation	Steel grade, standard designation	Brinell hardness, no more

Notes:

1. Gaskets U1 and U2 are intended for non-corrosion-resistant equipment.

2. K1 gaskets are intended for equipment operating in a downhole environment with a volumetric content of C0 2 up to 6%, KZ gaskets are intended for equipment operating in a downhole environment with a volumetric content of C0 2 and H 2 S up to 25%.

1.4. Gaskets made of non-alloy steels must be coated.

Type of coating - cadmium or zinc according to GOST 9.301.

Coating thickness - 5-13 microns.

1.5. The sealing surfaces of the gaskets must be free of corrosion, dirt, nicks, scratches, dents and other defects.

2. Technical requirements for flange connection studs

2.1. Studs should be made from rolled bars or forgings.

2.2. The mechanical properties of the material of blanks or finished studs in a heat-treated state must correspond to those indicated in the table. 9.

For equipment of the HL and UHL versions in accordance with GOST 15150, the value of the impact strength of the stud material after heat treatment must be no lower than KCV 20 J/cm 2 at a temperature of minus 60 °C. Impact strength is checked when choosing a material and heat treatment mode.

2.4. The studs must be coated. Type of coating - cadmium with chromating according to GOST 9.301.

Coating thickness - 9-12 microns. By agreement with the consumer, another type of metal coating is allowed.

2.5. Protective coatings must be uniform, bubbles and peeling are not allowed.

2.6. Requirements for the roughness of treated surfaces for coatings are in accordance with GOST 9.301.

2.7. The remaining technical requirements are in accordance with the regulatory and technical documentation for equipment equipped with studs.

3. Technical requirements for nuts

3.1. Nuts should be made from long and calibrated rolled products, forgings or stampings.

3.2. The mechanical properties of the nuts must correspond to those indicated in the table. 10.

The test load voltage is checked when selecting materials and heat treatments. Test method - in accordance with GOST 1759.5.

3.4. Nuts must be manufactured with a coating. Type of coating - cadmium with chromating according to GOST 9.301. Coating thickness - 9-12 microns.

By agreement with the consumer, another type of metal coating is allowed. In these cases, the designation of the type of coating according to GOST 1759.0 is added to the symbol of the nut.

3.5. Protective coatings must be uniform, bubbles and peeling are not allowed.

3.6. Requirements for the roughness of treated surfaces for coatings are in accordance with GOST 9.301.

3.7. The remaining technical requirements are in accordance with the regulatory and technical documentation for equipment equipped with nuts.

APPENDIX 2 Mandatory

SYMBOLS OF FLANGE CONNECTIONS AND THEIR COMPONENTS

1. In the technical documentation for wellhead equipment, when specifying the connecting dimensions of flanges, their symbol should be given.

The symbol for flanges (flange connections) must consist of the word “Flange”, the designation of the flange in accordance with Table. 2 and 3 and symbols of this standard.

Examples of designation of flanges (flange connections) in the design documentation are shown in Fig. 8.

Flan 180*35GOST

GOST 28919-91 S. 13

An example of a symbol for a P35 gasket made of steel 08kp GOST 1050:

3. The symbol of the stud should consist of the word “Hud”, a code constructed according to the diagram below, and the designation of the regulatory and technical document for delivery.

An example of a symbol for a nut with a thread diameter of M36 with a fine thread pitch of 3 mm for a flange connection type 2 with cadmium coating and chromating with a thickness of 10 microns:

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the USSR Ministry of Heavy Engineering

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Product Quality Management and Standards dated February 26, 1991 No. 178

3. INTRODUCED FOR THE FIRST TIME

4. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

5. The validity period was lifted according to Protocol No. 7-95 of the Interstate Council for Standardization, Metrology and Certification (NUS 11-95)

6. REPUBLICATION. January 2005

Editor V.N. Kopysov Technical editor V.N. Prusakova Proofreader E.D. Dulneva Computer layout L.A. Circular

Ed. persons No. 02354 dated July 14, 2000. Delivered for recruitment on January 24, 2005. Signed for publication on February 11, 2005. Uel. oven l. 1.86. Academic ed. l. 1.50. Circulation 74 copies. C 439. Zak. 77.

IPC Standards Publishing House, 107076 Moscow, Kolodezny lane, 14. http://www.standards.ru e-mail: [email protected] Typed in the Publishing House on a PC Printed in the IPC branch of the Publishing House of Standards - type. "Moscow Printer", 105062 Moscow, Lyalin lane, 6.

PPR No. 080102

Table 1

Nominal diameter D y, mm	Flange connection type

	Working pressure Р р, MPa	Gap between flanges, 5*, mm	Working pressure Р р, MPa
		Gap between flanges, 5*, mm

*Size for reference.

Note: The “x” sign indicates that this combination of parameters is provided.

1.2. The standard provides two versions of flanges:

1 - for flange connections type 1 (Fig. 2);

2 - for flange connections type 2 (Fig. 3).

The flange parameters must correspond to those indicated in the table. 2 and 3.

Flange designation

Nominal diameter D y

Outer diameter D

Diameter of groove at the mating end Di, not less

Average diameter of gasket groove Dy

Large neck diameter Da

Full plate height h

Main plate height hi

Groove width b

Groove depth /

Flange designation

Nominal diameter Dy

Diameter of passage hole d, no more

Outer diameter D

Diameter of the pitch circle of the centers of the holes for the studs D\

Diameter of groove at the mating end Ih, not less

Average diameter of the groove for the gasket Dз

Large neck diameter Da

Diameter of holes for studs d\

Number of holes for studs p

Full plate height h

Main plate height h\

Groove width b

				Flange designation
				Nominal diameter Dy
				Diameter of passage hole d, no more
				Outer diameter D
				Diameter of the pitch circle of the centers of the holes for the studs D\
				Diameter of the groove at the mating end Z>2
				Outer diameter of gasket groove Dy
				Large neck diameter D>4
				Small neck diameter Dy, not less
				Diameter of holes for studs d\
				Number of holes for studs p
				Height of the conical part of the neck H
				Full plate height h
				Groove width b
				Groove depth /
				Gasket designation
				Thread of studs and nuts		S 3 s g 1 2 x 5 2 2 >< & О ^ <г Q -С g ta &э S

A

I

Р р 140 MPa

1.3. The standard provides for two versions of gaskets:

P - for flange connections type 1 (Fig. 4);

BH - for flange connections type 2 (Fig. 5).

The design, dimensions, weight and applicability of gaskets must correspond to the following versions:

P - damn. 4 and table. 4;

Dimensions, mm

Table 4

Designation gaskets	Average diameter D	End width b (	Weight, kg, no more

Dimensions, mm

Table 5

Designation gaskets	Outer diameter D	Outer diameter of end 2),	End width b (	fillets	Weight, kg, no more

Dimensions, mm

Continuation of the table. 5

Designation gaskets	Outer diameter B	End outer diameter By	End width by	Bypass diameter d	rounded	Weight, kg, no more

1.4. The standard provides for two versions of studs:

1 - for parts with smooth holes;

2 - with screwed end.

The design, dimensions and applicability of the studs must correspond to those indicated in the drawing. 6 and in table. 2 and 3.

Version 1

d - diameter of the stud thread in accordance with table. 2 or 3;

/j = 1.25 for threads from M16 to MZO inclusive; /, = d for minimum wage and more; dy - according to GOST 19256 or GOST 19258;

L - stud length in accordance with table. 2 or 3.

L = Ly for flange-to-flange connection or L = b 2 for flange-to-body connection

Studs of version 1 can be manufactured with threads along the entire length.

1.5. The design, dimensions and application of nuts must correspond to those indicated in the drawing. 7 and in table. 6 and 7.

44 V)

					Nominal thread diameter d
						Thread pitch
						Thread pitch
						Key size S
						Key size S
					Diameter of circumscribed circle D, not less


					Limit displacement of the hole axis relative to the faces
					Weight, kg
180x70; 180 x 105; 230 x 70	100 X 105; 80 x 140	80 x 105; 100 x 70; 50 x 140	80 x 70; 65 x 105	65 x 70; 50 x 105	Suitable for type 2 flange connections

Nut parameters for flange connections type 2

Dimensions, mm

Nominal thread diameter d

Thread pitch

Key size S

Diameter of circumscribed circle D, not less

Limit displacement of the hole axis relative to the faces

Weight, kg

540 x 14; 425 x21 230 x 35

230x21; 280x21; 350x21

100 x 35; 280 x 14; 350 x 14

230 x 14; 100x21; 180x21; 80x35

180 x 14; 65x21; 65x35

180 x 14; 50x21; 80x21; 50x35

65 x 14; 80 x 14

Applicability of nuts in type 1 flange connections

FLANGE CONNECTIONS OF WELLHEAD EQUIPMENT TYPES, MAIN PARAMETERS AND DIMENSIONS

GOST 28919-91

USSR STATE COMMITTEE FOR PRODUCT QUALITY MANAGEMENT AND STANDARDS

Moscow 1991

STATE STANDARD OF THE USSR UNION

FLANGED CONNECTIONS FOR WELLHEAD EQUIPMENT

Types, main parameters and sizes

Flange connections of wellhead equipment. Types, basic parameters and dimensions

GOST 28919-91

Validity period from 01.07.92

until 01.07. 1997

1. TYPES, PARAMETERS AND SIZES

1.1. Two types of flange connections are installed:

1 - with a gap between the ends of the flanges;

2 - without a gap between the ends of the flanges.

For each type of flange connection, two connection options are provided: flange to flange and flange to body (i.e., connecting a flange to a flange combined with a body).

Types, options and basic parameters of flange connections must correspond to those indicated in the drawing. 1 and in table. 1.

Tina flange connections

Table 1

Conditional diameter Dу, mm	Flange connection type

	Working pressure Рр, MPa	Gap between flanges, δ*, mm	Working pressure Рр, MPa
		Gap between flanges, δ*, mm

*Size for reference.

Note. An "X" indicates that this combination of parameters is available.

1.2. The standard provides 2 flange versions:

version 1 - for flange connections type 1 (Fig. 2);

version 2 - for flange connections type 2 (Fig. 3).

The flange parameters must correspond to those indicated in the table. 2 and 3.

1.3. The standard provides for two versions of gaskets:

P - for flange connections type 1 (Fig. 4);

BH - for flange connections type 2 (Fig. 5).

* f1max = f; f1min = 3 mm. Allowed for flanges combined with the body, f1 = 0.

** For flanges with an outer diameter of no more than 315 mm, the parallelism tolerance is 0.2/100.

Table 2

Parameters of flanges of version 1 (according to drawing 2)

Dimensions, mm

Flange designation

Conditional diameter Dу

Outer diameter D

Diameter of groove at the mating end D2, not less

Average diameter of gasket groove D3

Large neck diameter D4

Full plate height h

Main plate height h1

Groove width b

Groove depth f

Groove radius R

Gasket designation

Thread of studs and nuts

Stud length (according to drawing 1)

Table 3

Parameters of flanges of version 2 (according to drawing 3)

Dimensions, mm

Flange designation

Conditional diameter Dу

Diameter of passage hole d, no more

Outer diameter D

Diameter of the pitch circle of the centers of the holes for the studs D1

Diameter of the groove at the mating end D2

Outer diameter of gasket groove D3

Large neck diameter D4

Small neck diameter D5, not less

Diameter of holes for studs d1

Number of holes for studs n

Height of the conical part of the neck H

Full plate height h

Groove width b

Groove depth f

Applicability of components of flange connections

Gasket designation

Thread of studs and nuts

Stud length (according to drawing 1)

Table 4

Dimensions, mm

Gasket designation	Average diameter D	End width	Weight, kg, no more

Table 5

Dimensions, mm

Gasket designation	Outer diameter D	Outer diameter of end D1	End width b1	Bypass diameter d	Rounding radius R	Weight, kg, no more

The design, dimensions, weight and applicability of gaskets must correspond to the following versions:

P - damn. 4 and table. 4;

BH - damn. 5 and table. 5.

1.4. The standard provides for two versions of studs:

version 1 - for parts with smooth holes;

version 2 - with screwed end.

The design, dimensions and applicability of the studs must correspond to those indicated in the drawing. 6 and in table. 2 and 3.

d - diameter of the stud thread in accordance with table. 2 or 3;

l1 = 1.25 for threads from M16 to M30 inclusive; l1 = d for M33 and more;

d1 - according to GOST 19256 or GOST 19258;

L - stud length in accordance with table. 2 or 3.

L = L1 for flange-to-flange connection or L = L2 for flange-to-body connection.

Studs of version 1 can be manufactured with threads along the entire length.

1.5. The design, dimensions and application of nuts must correspond to those indicated in the drawing. 7 and in table. 6 and 7.

*Dimensions for reference

1.6. Technical requirements for gaskets, studs and nuts - according to Appendix 1.

1.7. Acceptance rules, test methods, marking and packaging of gaskets, nuts and studs - in accordance with the regulatory and technical documentation for the corresponding wellhead equipment.

1.8. Symbols for flanges, gaskets, studs and nuts - according to Appendix 2.

Table 6

Nut parameters for type 1 flange connections

Dimensions, mm

Nominal thread diameter d	Thread pitch	Key size S			Weight, kg	Applicability of nuts in type 1 flange connections
Nominal thread diameter d	Thread pitch		Prev. off	Prev. off	Weight, kg	Applicability of nuts in type 1 flange connections


						180"14; 50"21; 80"21; 50"35
						180"14; 65"21; 65"35
						230"14; 100"21; 180"21; 80"35
						100"35; 280"14; 350"14
						230"21; 280"21; 350"21

						540"14; 425"21 230"35

Table 7

Nut parameters for flange connections type 2

Dimensions, mm

Nominal thread diameter d	Thread pitch	Key size S		Diameter of circumscribed circle D, not less		Limit displacement of the hole axis relative to the faces	Weight, kg	Suitable for type 2 flange connections
Nominal thread diameter d			Prev. off	Diameter of circumscribed circle D, not less	Prev. glass	Limit displacement of the hole axis relative to the faces	Weight, kg	Suitable for type 2 flange connections



								80"105; 100"70; 50"140


								180"70; 180"105; 230"70

								100"140; 680"14; 280"70
								230"105; 425"35; 425"70; 350"70
								680"21; 180"140; 540"35; 280"105; 480"35



								480"105; 350"140

TECHNICAL REQUIREMENTS FOR CONNECTING PARTS OF FLANGED CONNECTIONS

1. Technical requirements for gaskets

1.1. Gaskets must be made only from solid pieces.

1.2. The hardness of the material for the manufacture of ring gaskets should be no more than:

carbon steel - 107 НВ;

high-quality steel - 131 НВ;

carbon steel - 160 HB.

Table 8

Gasket material designation	Steel grade, standard designation	Brinell hardness, no more
	Steel 0 GOST 380
	St 08kp GOST 1050
	St 20 GOST 1050
	St 08 GOST 1050
	12"18N9T GOST 5632
	10"17N13M3T GOST 5632

Notes:

1. Gaskets U1 and U2 are intended for non-corrosion-resistant equipment.

1.4. Gaskets made of non-alloy steels must be coated.

Type of coating - cadmium or zinc according to GOST 9.301.

Coating thickness - 5-13 microns.

1.5. The sealing surfaces of the gaskets must be free of corrosion, dirt, nicks, scratches, dents and other defects.

2. TECHNICAL REQUIREMENTS FOR FLANGE CONNECTION STUDS

2.1. Studs should be made from rolled bars or forgings.

2.2. The mechanical properties of the material of blanks or finished studs in a heat-treated state must correspond to those indicated in Table 9.

Table 9

Flange connection type	Yield strength, N/mm2	Tensile strength, N/mm	Elongation, %	Impact strength,
Flange connection type

2.4. The studs must be coated. Type of coating - cadmium with chromating according to GOST 9.301.

Coating thickness - 9-12 microns. By agreement with the consumer, another type of metal coating is allowed.

2.5. Protective coatings must be uniform; bubbles and peeling are not allowed.

2.6. Requirements for the roughness of treated surfaces for coatings are in accordance with GOST 9.301.

2.7. The remaining technical requirements are in accordance with the regulatory and technical documentation for equipment equipped with studs.

3. TECHNICAL REQUIREMENTS FOR NUTS

3.1. The nut should be made from long and calibrated rolled products, forgings or stampings.

3.2. The mechanical properties of the nuts must correspond to those indicated in the table. 10.

Table 10

The test load voltage is checked when selecting materials and heat treatments. Test method - in accordance with GOST 1759.5.

3.4. Nuts must be manufactured with a coating. Type of coating - cadmium with chromating according to GOST 9.301. Coating thickness - 9-12 microns.

By agreement with the consumer, another type of metal coating is allowed. In these cases, is added to the nut symbol.

3.5. Protective coatings must be uniform, bubbles and peeling are not allowed.

3.6. Requirements for the roughness of treated surfaces for coatings are in accordance with GOST 9.301.

3.7. The remaining technical requirements are in accordance with the regulatory and technical documentation for equipment equipped with nuts.

APPENDIX 2

Mandatory

SYMBOLS OF FLANGE CONNECTIONS AND THEIR COMPONENTS

1. In the technical documentation for wellhead equipment, when specifying the connecting dimensions of flanges, their symbol should be given.

The symbol for flanges (flange connections) must consist of the word “Flange”, the designation of the flange in accordance with Table. 2 and 3 and symbols of this standard.

Examples of designation of flanges (flange connections) in the design documentation are shown in Fig. 8.

An example of a symbol for a P35 gasket made of steel 08kp GOST 1050:

Gasket P35 - U1 GOST 28919-91

3, The symbol of the stud should consist of the word “Stud”, a code constructed according to the diagram below, and the designation of the regulatory and technical document for delivery.

Execution in accordance with the drawing. 6

Thread diameter

Stud length

Designation of the type of coating according to GOST 1759.0

Coating thickness

An example of a designation for a stud of version 1, thread diameter M24 with a large thread pitch, length L = 150 mm of a flange connection type 1 with a cadmium coating 10 microns thick:

Hairpin 1-M24"150-1-02.10 GOST 28919-91

4. The symbol of the nut must consist of the word “Nut”, a code constructed according to the diagram below, and the designation of the regulatory and technical document for delivery.

Thread diameter

Thread pitch (large pitch is not indicated)

Type of flange connection (according to clause 1.1 of this standard)

Designation of the type of coating according to GOST 1759.0

Coating thickness

An example of a symbol for a nut with a thread diameter of M36 with a fine thread pitch of 3 mm for a flange connection type 2 with cadmium coating and chromating with a thickness of 10 microns:

Nut M24"3-2-02.10 GOST 28919-91

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the USSR Ministry of Heavy Engineering

DEVELOPERS

N. G. Kurbanov; A. G. Dozortsev, Ph.D. tech. sciences; T.K.Believ, Ph.D. tech. sciences; B. O. Frenkel, Ph.D. tech. sciences;Kh. T. Kahramanov, Ph.D. tech. sciences; I. M. Nisenbaum

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Product Quality Management and Standards dated February 26, 1991 No. 178

3. Inspection period - 1996. Inspection frequency - 5 years.

4. INTRODUCED FOR THE FIRST TIME

5. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

	Item number
GOST 9.301-86	Appendix 1
	Appendix 1
GOST 1050-88	Appendix 1, 2
GOST 1759.0-87	Appendix 1, 2
GOST 1759.5-87	Appendix 1
GOST 5632-72	Appendix 1
GOST 9150-81	Appendix 1
GOST 15150-69	Appendix 1
GOST 16093-81	Appendix 1
GOST 19256-73
GOST 19258-73
GOST 22032-76
GOST 22034-76
GOST 22042-76
GOST 24705-81	Appendix 1
GOST 27148-86	Appendix 1