HG/T 20634-2009 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| HG/T 20634-2009 | English | 115 |
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Bolting for use with steel pipe flanges (Class designated)
| Valid |
| HG 20634-1997 | English | RFQ |
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(Steel pipe flanges with fasteners (American System))
| Obsolete |
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HG/T 20634-2009: Bolting for use with steel pipe flanges (Class designated)---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/HGT20634-2009
INDUSTRY STANDARD
Replacing HG 20634-1997
Bolting for Use with Steel Pipe Flanges
(Class Designated)
Issued on. FEBRUARY 05, 2009
Implemented on. JULY 01, 2009
Issued by. The Ministry of Industry and Information Technology of the People’s
Republic of China
HG
Corrigenda of HG/T 20634-2009
Confirmed in May 2012
Clause / Table / Figure Modified Contents
Original Text Modified to (Corrected as)
Figure 3.4.1 I-shape hexagon nut I-shape hexagon nut (Example)
Table 4.0.4 (Line 1) HB HB (HRB)
Table 4.0.4 - Continued
(Line 6)
Quenching
(Tempering≥620ºC)
(The whole line shall be
deleted.)
Table 4.0.4 - Continued
(Line 7)
Solid solution + strain
hardening ≥ 99
Solid solution + ageing
hardening (≥ 99)
Table 5.0.3 (Line 5) Special nuts for pipe flange
- 0Crl8Ni9 - ＞-20～+800
Special nuts for pipe flange
- 0Crl8Ni9 - ＞-196～+800
Table 5.0.4 Matching of hexagon
boltings and nuts
Matching of hexagon boltings,
studs, and nuts
Table 5.0.8 M52x4, M56x4 M52x3, M56x3
8.0.4...shall be individually
inspected for
magnetic-particle-inspection
in accordance with JB/T
4730...
...shall be individually
inspected for
magnetic-particle or coloration
inspection in accordance with
JB/T 4730...
Table 10.2.2-2 1) (add a new column) Material
designation. A194, 7;
Code. 7
2) (Add note) Note. For
35CrMo and A194, 7 which
are required to perform low
temperature impact test, the
code shall be appended
with “L”.
Figure B.0.2 L L1 B.0.5 1
Table of Contents
Corrigenda of HG/T 20634-2009... 2
1 Scope... 4
2 Normative References... 4
3 Type, Specification and Dimension of Boltings... 5
3.1 Types of boltings... 5
3.2 Hexagon boltings... 5
3.3 Full-thread studs... 5
3.4 Nuts... 6
4 Materials... 7
5 Use of Boltings... 9
6 Dimension Tolerance... 21
7 Surface Treatment... 21
8 Inspection... 21
9 Acceptance, Packaging and Quality Certificate... 22
10 Designation and Marks... 22
10.1 Designation examples... 22
10.2 Steel-seal signs... 22
Annex A (Informative) Flat washer for pipe flange bolting... 24
Annex B (Informative) Bolting for use with insulating flange and bolting insulation part... 26
Bolting for Use with Steel Pipe Flanges
(Class Designated)
1 Scope
This Standard specifies style, dimension, material, mark, technical requirements and application
provisions for boltings of steel pipe flange (Class designated).
This Standard is applicable to boltings of steel pipe flange of HG/T 20615 and HG/T 20623, which
include hexagon head bolting, isometric studs, full thread studs and nut.
2 Normative References
The articles contained in the following documents become part of this Standard when they are
quoted herein. For the dated documents so quoted, all the modifications (excluding corrections)
or revisions made thereafter shall not be applicable to this Standard. For the undated documents
so quoted, the latest editions shall be applicable to this Standard.
3 Type, Specification and Dimension of Boltings
3.1 Types of boltings
Types of bolting for use with steel pipe flange are hexagon head boltings, full-thread studs,
I-shape hexagon nuts, and special nuts.
3.2 Hexagon boltings
3.2.1 Type and dimension of hexagon head boltings shall comply with the requirements of GB/T
5782 and GB/T 5785.The end of the hexagon head boltings shall use the chamfer side, as
shown in figure 3.2.1, and bolting chamfer shall comply with the provisions in GB/T 2.
Figure 3.2.1 Hexagon bolting
3.3.3 Specification and material of full-thread studs shall be in accordance with Table 3.3.3.
3.4 Nuts
3.4.1 The type of nuts matching with hexagon boltings shall meet the requirements of GB/T 6170,
as shown in Figure 3.4.1.
3.4.2 The type and dimension of nuts matching with full-thread bolting (special nut for pipe flange)
shall be complied with provisions in figure 3.4.1 and 3.4.2.Other requirements shall be complied
with provisions in GB/T 6170.
4 Materials
4.0.1 Material of bolting used for steel pipe flanges is divided into high-strength, medium-strength
and low-strength material according to table 4.0.1.
4.0.2 Working pressure and range of temperature of the bolting material shall comply with Table
5.0.3 of this Standard.
4.0.3 Material and mechanical property of commercial grade bolting shall meet the provisions in
GB/T 3098.1, GB/T 3098.2, GB/T 3098.6 and GB/T 3098.15.
4.0.4 Chemical composition, heat treatment and mechanical property of the special grade bolting
shall meet the requirements of Table 4.0.4.Mechanical property of the sample shall be cut along
the rolling direction on the roughcast after a specified heat treatment. Cutting position of sample.
4.0.5 The roughcast of full-thread studs shall be performed for mechanical performance by batch.
The roughcast of special-use nuts shall be performed for hardness test by batch.
5 Use of Boltings
5.0.1 The use of commodity-grade hexagon boltings and type I hexagon nuts shall meet the
following requirements.
5.0.2 Besides 5.0.1, special-grade full-thread boltings and special nuts shall be used.
5.0.3 The bolting working pressure and temperature range shall comply with the provisions of
Table 5.0.3.
5.0.8 The mass of the nuts shall be in accordance with Table 5.0.8.
5.0.9 The use of gaskets shall be in accordance with the provisions of Annex A of this Standard.
5.0.10 The selection of insulation flange bolting shall be in accordance with the provisions of
Annex B of this Standard.
6 Dimension Tolerance
6.0.1 The dimension tolerance and surface defects of commodity-grade boltings shall meet the
requirements of relevant bolting national standards.
6.0.2 Professional-grade Bolting.
7 Surface Treatment
Alloy-steel boltings shall be treated with bluing.
8 Inspection
8.0.1 The delivery inspection of commodity-grade boltings shall be in accordance with
corresponding national standard requirements.
8.0.2 The delivery inspection of professional-grade boltings shall be done in batches. The
maximum batch quantity for studs is 3000 pieces, and the maximum batch quantity for nuts is
5000 pieces.
8.0.3 The professional-grade boltings shall be sampled and inspected in batches after heat
treatment, and shall comply with requirements in Table 4.0.4 of this Standard.
8.0.4 The full-thread studs with nominal pressure greater than Class600 (PN100) shall be
individually inspected for magnetic-particle-inspection in accordance with JB/T 4730, and shall
comply with Grade II requirements.
9 Acceptance, Packaging and Quality Certificate
9.0.1 The dimension, appearance, performance examination, acceptance, and packaging of
boltings shall comply with the GB/T 90.1 and GB/T 90.2 provisions.
HG/T 20634-2009
INDUSTRY STANDARD
Replacing HG 20634-1997
Bolting for Use with Steel Pipe Flanges
(Class Designated)
Issued on. FEBRUARY 05, 2009
Implemented on. JULY 01, 2009
Issued by. The Ministry of Industry and Information Technology of the People’s
Republic of China
HG
Corrigenda of HG/T 20634-2009
Confirmed in May 2012
Clause / Table / Figure Modified Contents
Original Text Modified to (Corrected as)
Figure 3.4.1 I-shape hexagon nut I-shape hexagon nut (Example)
Table 4.0.4 (Line 1) HB HB (HRB)
Table 4.0.4 - Continued
(Line 6)
Quenching
(Tempering≥620ºC)
(The whole line shall be
deleted.)
Table 4.0.4 - Continued
(Line 7)
Solid solution + strain
hardening ≥ 99
Solid solution + ageing
hardening (≥ 99)
Table 5.0.3 (Line 5) Special nuts for pipe flange
- 0Crl8Ni9 - ＞-20～+800
Special nuts for pipe flange
- 0Crl8Ni9 - ＞-196～+800
Table 5.0.4 Matching of hexagon
boltings and nuts
Matching of hexagon boltings,
studs, and nuts
Table 5.0.8 M52x4, M56x4 M52x3, M56x3
8.0.4...shall be individually
inspected for
magnetic-particle-inspection
in accordance with JB/T
4730...
...shall be individually
inspected for
magnetic-particle or coloration
inspection in accordance with
JB/T 4730...
Table 10.2.2-2 1) (add a new column) Material
designation. A194, 7;
Code. 7
2) (Add note) Note. For
35CrMo and A194, 7 which
are required to perform low
temperature impact test, the
code shall be appended
with “L”.
Figure B.0.2 L L1 B.0.5 1
Table of Contents
Corrigenda of HG/T 20634-2009... 2
1 Scope... 4
2 Normative References... 4
3 Type, Specification and Dimension of Boltings... 5
3.1 Types of boltings... 5
3.2 Hexagon boltings... 5
3.3 Full-thread studs... 5
3.4 Nuts... 6
4 Materials... 7
5 Use of Boltings... 9
6 Dimension Tolerance... 21
7 Surface Treatment... 21
8 Inspection... 21
9 Acceptance, Packaging and Quality Certificate... 22
10 Designation and Marks... 22
10.1 Designation examples... 22
10.2 Steel-seal signs... 22
Annex A (Informative) Flat washer for pipe flange bolting... 24
Annex B (Informative) Bolting for use with insulating flange and bolting insulation part... 26
Bolting for Use with Steel Pipe Flanges
(Class Designated)
1 Scope
This Standard specifies style, dimension, material, mark, technical requirements and application
provisions for boltings of steel pipe flange (Class designated).
This Standard is applicable to boltings of steel pipe flange of HG/T 20615 and HG/T 20623, which
include hexagon head bolting, isometric studs, full thread studs and nut.
2 Normative References
The articles contained in the following documents become part of this Standard when they are
quoted herein. For the dated documents so quoted, all the modifications (excluding corrections)
or revisions made thereafter shall not be applicable to this Standard. For the undated documents
so quoted, the latest editions shall be applicable to this Standard.
3 Type, Specification and Dimension of Boltings
3.1 Types of boltings
Types of bolting for use with steel pipe flange are hexagon head boltings, full-thread studs,
I-shape hexagon nuts, and special nuts.
3.2 Hexagon boltings
3.2.1 Type and dimension of hexagon head boltings shall comply with the requirements of GB/T
5782 and GB/T 5785.The end of the hexagon head boltings shall use the chamfer side, as
shown in figure 3.2.1, and bolting chamfer shall comply with the provisions in GB/T 2.
Figure 3.2.1 Hexagon bolting
3.3.3 Specification and material of full-thread studs shall be in accordance with Table 3.3.3.
3.4 Nuts
3.4.1 The type of nuts matching with hexagon boltings shall meet the requirements of GB/T 6170,
as shown in Figure 3.4.1.
3.4.2 The type and dimension of nuts matching with full-thread bolting (special nut for pipe flange)
shall be complied with provisions in figure 3.4.1 and 3.4.2.Other requirements shall be complied
with provisions in GB/T 6170.
4 Materials
4.0.1 Material of bolting used for steel pipe flanges is divided into high-strength, medium-strength
and low-strength material according to table 4.0.1.
4.0.2 Working pressure and range of temperature of the bolting material shall comply with Table
5.0.3 of this Standard.
4.0.3 Material and mechanical property of commercial grade bolting shall meet the provisions in
GB/T 3098.1, GB/T 3098.2, GB/T 3098.6 and GB/T 3098.15.
4.0.4 Chemical composition, heat treatment and mechanical property of the special grade bolting
shall meet the requirements of Table 4.0.4.Mechanical property of the sample shall be cut along
the rolling direction on the roughcast after a specified heat treatment. Cutting position of sample.
4.0.5 The roughcast of full-thread studs shall be performed for mechanical performance by batch.
The roughcast of special-use nuts shall be performed for hardness test by batch.
5 Use of Boltings
5.0.1 The use of commodity-grade hexagon boltings and type I hexagon nuts shall meet the
following requirements.
5.0.2 Besides 5.0.1, special-grade full-thread boltings and special nuts shall be used.
5.0.3 The bolting working pressure and temperature range shall comply with the provisions of
Table 5.0.3.
5.0.8 The mass of the nuts shall be in accordance with Table 5.0.8.
5.0.9 The use of gaskets shall be in accordance with the provisions of Annex A of this Standard.
5.0.10 The selection of insulation flange bolting shall be in accordance with the provisions of
Annex B of this Standard.
6 Dimension Tolerance
6.0.1 The dimension tolerance and surface defects of commodity-grade boltings shall meet the
requirements of relevant bolting national standards.
6.0.2 Professional-grade Bolting.
7 Surface Treatment
Alloy-steel boltings shall be treated with bluing.
8 Inspection
8.0.1 The delivery inspection of commodity-grade boltings shall be in accordance with
corresponding national standard requirements.
8.0.2 The delivery inspection of professional-grade boltings shall be done in batches. The
maximum batch quantity for studs is 3000 pieces, and the maximum batch quantity for nuts is
5000 pieces.
8.0.3 The professional-grade boltings shall be sampled and inspected in batches after heat
treatment, and shall comply with requirements in Table 4.0.4 of this Standard.
8.0.4 The full-thread studs with nominal pressure greater than Class600 (PN100) shall be
individually inspected for magnetic-particle-inspection in accordance with JB/T 4730, and shall
comply with Grade II requirements.
9 Acceptance, Packaging and Quality Certificate
9.0.1 The dimension, appearance, performance examination, acceptance, and packaging of
boltings shall comply with the GB/T 90.1 and GB/T 90.2 provisions.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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