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SH/T 3403-2013 (SH/T3403-2013, SHT 3403-2013, SHT3403-2013) & related versions
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SH/T 3403-2013: PDF in English (SHT 3403-2013)
SH/T 3403-2013
SH
PETROCHEMICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 23.040.60
P 72
Record No.: J1771-2014
Replacing SH 3403-1996
Metallic Ring Joint Gaskets for Steel Pipe Flanges in
Petrochemical Industry
ISSUED ON: OCTOBER 17, 2013
IMPLEMENTED ON: MARCH 1, 2014
Issued by: Ministry of Industry and Information Technology of the People’s
Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 General Requirements ... 6
3.1 Metallic ring joint gasket types ... 6
3.2 Nominal pressure and nominal diameter ... 6
3.3 Ring No... 6
4 Gasket Types, Dimensions and Tolerances ... 7
4.1 Gasket types ... 7
4.2 Gasket dimensions and tolerances ... 8
5 Technical Conditions ... 11
5.1 Material ... 11
5.2 Fabrication requirements ... 12
6 Examination and Test ... 12
6.1 Examination ... 12
6.2 Test ... 12
7 Product Quality Certificate ... 12
8 Marking, Tag, Protection and Packing ... 13
8.1 Marking and tag ... 13
8.2 Protection and packing ... 14
Explanation of Wording in this Standard ... 15
Foreword
According to the requirements of The First Batch of Industry Standards Formulation and
Revision Plan in 2010 (GXTK [2010] No. 74) issued by the Ministry of Industry and
Information Technology of the People's Republic of China's, the standard preparation team
revised this Standard through conducting extensive research and carefully summarizing
practical experience, referring to relevant international standards and foreign advanced
standards, and basing on extensive solicitation of opinions.
This Standard was totally divided into 8 clauses.
The major technical contents of this Standard include: Types, dimensions and tolerances,
technical conditions, examination and test, etc. of metallic ring joint gasket for steel pipe flanges,
This Standard was revised on the basis of SH 3403-1996 Metallic ring joint gaskets for pipe
flanges. The major revised technical contents are as follows:
--- Modify the standard name into Metallic Ring Joint Gaskets for Steel Pipe Flanges in
Petrochemical Industry;
--- Revise the Normative References;
--- Update the original nominal pressure expression method; and add a comparison list of
the Class expression method;
---Add the dimensions of gaskets for A series flanges with nominal diameter DN600 or
above;
--- Supplement the content of examination and test.
This Standard is managed by China Petrochemical Corporation; the Piping Design Technology
Center Station of China Petrochemical Corporation is responsible for daily management; and
Sinopec Engineering Incorporation is responsible for the interpretation of specific technical
contents. If there are any comments or suggestions during the implementation process, please
send them to the management organization and chief drafting organization.
Daily management organization of this Standard: Piping Design Technology Center Station of
China Petrochemical Corporation.
Address: Block 21 Anhuibeilianyuan, Chaoyang District, Beijing.
Zip code: 100101
Tel.: 010-84877282
Fax: 010-64949514
Metallic Ring Joint Gaskets for Steel Pipe Flanges in
Petrochemical Industry
1 Scope
This Standard specifies the requirements for the type, size and tolerance, technical conditions,
examination and test of metallic ring joint gaskets for steel pipe flanges in petrochemical
industry.
This Standard is applicable to the manufacture and acceptance of metallic ring joint gaskets for
grooved-surface steel pipe flanges with nominal pressures PN20 (Class 150) ~ PN420 (Class
2500) specified in SH/T 3406 Steel Pipe Flanges for Petrochemical Industry.
2 Normative References
The following documents are essential to the application of this Document. For the dated
documents, only the versions with the dates indicated are applicable to this Document; for the
undated documents, only the latest version (including all the amendments) is applicable to this
Document.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 230.1 Metallic materials – Rockwell hardness test – Part 1: Test method
GB/T 231.1 Metallic materials – Brinell hardness test – Part 1: Test method
GB/T 699 Quality carbon structural steels
GB/T 1220 Stainless steel bars
NB/T 47008 Carbon and alloy steel forgings for pressure equipment
NB/T 47010 Stainless and heat-resisting steel forgings for pressure equipment
SH/T 3406 Steel pipe flanges for petrochemical industry
5.2 Fabrication requirements
5.2.1 The metallic ring joint gasket is made of forging and machining. The forged blank shall
meet the requirements of Level-II forgings specified in NB/T 47008 or NB/T 47010. Tailor
welding is not allowed for metallic ring joint gaskets.
5.2.2 The sealing surface roughness of the metal ring joint gasket shall be less than or equal to
Ra1.6.
6 Examination and Test
6.1 Examination
6.1.1 The metallic ring joint gasket shall be visually examined piece by piece. The sealing
surface of the metallic ring joint gasket shall not have scratches, dents, cracks, spots and other
defects.
6.1.2 The dimensions of the metallic ring joint gasket shall be examined piece by piece and
shall comply with the provisions of Clause 4 in this Standard.
6.1.3 If the users have any other examination requirements, which shall be noted in the contract.
6.2 Test
6.2.1 The blank hardness shall be tested according to the relevant provisions of GB/T 231.1.
6.2.2 The product hardness shall be tested according to the relevant provisions of GB/T 230.1.
The average hardness measured at four symmetrical points around the entire circumference
shall comply with the provisions of Table 5.1.2 in this standard.
7 Product Quality Certificate
7.1 The metallic ring joint gaskets manufactured according to this Standard shall be
accompanied by product quality certificate for each batch.
7.2 The product quality certificate shall include the following contents:
a) Name of manufacturer and date of manufacture;
b) Stamp of the Manufacturer’s Technical (Quality) Inspection Department;
c) Signature of quality inspector and date of inspection;
d) Product name, specification, material, and material standard;
......

BASIC DATA
Standard ID SH/T 3403-2013 (SH/T3403-2013)
Description (Translated English) Metallic ring joint gaskets for steel pipe flanges in petrochemical industry
Sector / Industry Petrochemical Industry Standard (Recommended)
Classification of Chinese Standard P72
Classification of International Standard 23.040.60
Word Count Estimation 14,113
Older Standard (superseded by this standard) SH 3403-1996
Quoted Standard GB/T 222; GB/T 230.1; GB/T 231.1; GB/T 699; GB/T 1220; NB/T 47008; NB/T 47010; SH/T 3406
Drafting Organization China Petrochemical Engineering Construction Co., Ltd.
Administrative Organization People's Republic of China Ministry of Industry and Information Technology
Regulation (derived from) Ministry of Industry and Information Technology Bulletin No. 52 of 2013
Summary This standard specifies the petrochemical steel pipe flanges with metal ring gasket type, dimensions and tolerances, technical conditions, inspection and testing requirements. Ring groove surface of steel pipe flanges This standard applies to SH/T 3406 "P