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GB/T 3091-2008 English PDF (GBT3091-2008)

GB/T 3091-2008 English PDF (GBT3091-2008)

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GB/T 3091-2008: Welded steel pipes for low pressure liquid delivery

This standard specifies the dimension, appearance, weight, technical requirements, test method, test rules, packing, marking, and quality certificate of welded steel pipes for low pressure liquid delivery. This standard is applicable to welded steel pipes for delivering low pressure liquid such as water, air, heating steam, and gasses. This standard comprises longitudinal-seam high-frequency electrical resistance welded (ERW) steel pipes, longitudinal-seam submerged arc we2ded (SAWL) steel pipe, and spiral-seam submerged arc welded (SAWH) steel pipe. And it denotes the different requirements to each of them respectively. Those without marks are simultaneously applicable to longitudinal-seam high-frequency electrical resistance welded steel pipe, longitudinal-seam submerged arc welded steel pipe, and spiral seam submerged arc welded steel pipe.
GB/T 3091-2008
GB
ICS 77.140.75
H 48
NATIONAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Replacing GB/T 3091-2001
Welded Steel Pipes
for Low Pressure Liquid Delivery
(ISO 559.1991, NEQ)
ISSUED ON. MAY 13, 2008
IMPLEMENTED ON. NOVEMBER 01, 2008
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the PEOPLE Republic of China;
Standardization Administration of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Content of ordering ... 8
4 Dimension, appearance and weight ... 8
5 Technical requirements ... 11
6 Test methods ... 17
7 Test rules ... 19
8 Packing, marking and quality certificate ... 19
Appendix A ... 20
Appendix B ... 21
Appendix C ... 23
Foreword
This standard is not equivalent to ISO 559.1991 ?€?Steel Tubes for Water and Sewage?€? (English edition).
This standard will replace GB/T 3091-2001 ?€?Welded Steel Pipe for Low Pressure Liquid Delivery?€?. There have been some significant changes in this standard over GB/T 3091-2001 in the following technical aspects.
?€? Add spiral seam submerged arc welding steel tube and relevant contents; ?€? Adjust external diameter and wall thickness series;
?€? It is stricter to the permissible variation of external diameter of steel tube whose external diameter is larger than 508mm;
?€? It is stricter to the permissible variation of steel tube's wall thickness; ?€? Add permissible variation of weight;
?€? Add Q195 steel grade;
?€? It is stricter to the tensile test;
?€? It is stricter to the flattening test requirement;
?€? Add requirement of face guided bend test for submerged arc welding steel tube; ?€? Adjust hydraulic test value of steel tube;
?€? Clearly define the provisions about galvanizing coat.
Appendix A of this standard is informative; appendix B and appendix C are normative. This standard was proposed by China Iron and Steel Association.
This standard is under the jurisdiction of National Technical Committee of Standardization for Steel.
This standard was drafted by. Jinxi Steel Pipe Co., Ltd., Panyu Chu Kong Steel Pipe Co., Ltd., Jinghua Innovation Group Co., Ltd., and Zhejiang Kingland Pipeline Co., Ltd. Chief drafting staffs of this standard. Qi Huijuan, Zhu Xingwei, Zhao Fuliang, Wang Lishu, Shen Ganrong, Huang Kejian, and Yang Weifang.
The previous editions of the standard replaced by this standard are.
?€? GB/T 3091-1982, GB/T 3091-1993, GB/T 3091-2001.
Welded Steel Pipes
for Low Pressure Liquid Delivery
1??Scope
This standard specifies the dimension, appearance, weight, technical requirements, test method, test rules, packing, marking, and quality certificate of welded steel pipes for low pressure liquid delivery.
This standard is applicable to welded steel pipes for delivering low pressure liquid such as water, air, heating steam, and gasses.
This standard comprises longitudinal-seam high-frequency electrical resistance welded (ERW) steel pipes, longitudinal-seam submerged arc we2ded (SAWL) steel pipe, and spiral-seam submerged arc welded (SAWH) steel pipe. And it denotes the different requirements to each of them respectively. Those without marks are simultaneously applicable to longitudinal-seam high-frequency electrical resistance welded steel pipe, longitudinal-seam submerged arc welded steel pipe, and spiral seam submerged arc welded steel pipe.
2??Normative??references
The following documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigenda contents), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the documents. For undated references, the latest edition of the normative document referred to applies.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products GB/T 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy; The
Diantipyrylmethane Phosphomolybdate Gravimetric Method for the Determination of Phosphorus Content.
GB/T 223.5 Methods for Chemical Analysis of Iron, Steel and Alloy; The reduced molybdosilicate spectrophotometric method for the determination of acid-soluble silicon content
GB/T 223.10 Methods for Chemical Analysis of Iron, Steel and Alloy; The Cupferron Separation-chrome Azurol S Photometric Method for the Determination of Aluminium Content
GB/T 223.11 Methods for Chemical Analysis of Iron, Steel and Alloy; he
Ammonium Persulfate Oxidation Volumetric Method for the Determination of Chromium Content
GB/T 223.12 Methods for Chemical Analysis of Iron, Steel and All The Sodium Carbonate Separation-diphenyl Carbazide Photometric Method for the Determination of Chromium Contentoy;
GB/T 223.14 Methods for Chemical Analysis of Iron, Steel and Alloy; The N-benzoy- N-phenylhydroxylamine Extraction Photometric Method for the Determination of Vanadium Content
GB/T 223.16 Methods for Chemical Analysis of Iron, Steel and Alloy; The Chromotropic Acid Photometric Method for the Determination of Titanium Content GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy; The Sodium Thiosulfate Separation Iodimetric Method for the Determination of Copper Content
GB/T 223.19 Methods for Chemical Analysis of Iron, Steel and Alloy; The Neocuproine-chloroform Extraction Photometric Method for the Determination of Copper Content
GB/T 223.23 Methods for Chemical Analysis of Iron, Steel and Alloy; The Dimethylglyoxime Spectrophotometric Method for the Determination of Nickel Content GB/T 223.24 Methods for Chemical Analysis of Iron, Steel and Alloy; The Extraction Seperation-The Dimethylglyoxine Spectrophotometric Method for the Determination of Nickel Content
GB/T 223.32 Methods for Chemical Analysis of Iron, Steel and Alloy; The Hypophosphite Reduction-iodimetric Method for the Determination of Arsenic Content GB/T 223.36 Methods for Chemical Analysis of Iron, Steel and Alloy; The Neutral Titration Method for the Determination of Nitrogen Content after Distillation Separation GB/T 223.37 Methods for Chemical Analysis of Iron, Steel and Alloy; The Indophenal Blue Photometric Methods for the Determination of Nitrogen Content after Distillation Separation
GB/T223.40 Iron Steel and Alloy-Determination of Niobium Content by the Sulphochlorophenol S Spectrophotometri Method
GB/T223.53 Methods for Chemical Analysis of Iron, Steel and Alloy; The Flame Atomic Absorption Spectrophotometric Method for the Determination of Nitrogen Content GB/T 223.54 Methods for Chemical Analysis of Iron, Steel and Alloy; The Flame Atomic Absorption Spectrophotornetric Method for the Determination of Nickel Content GB/T 223.58 Methods for Chemical Analysis of Iron, Steel and Alloy; The Sodium Arsenite-Sodium Nitrite Titrimetric Method for the Determination of Manganese Content
GB/T 223.59 Methods for Chemical Analysis of Iron, Steel and Alloy; The Reduced Molybdoantimonyl Phosphoric Acid Phosphoric Method for the Determination of Phosphorus Content
GB/T 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy; The Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content GB/T 223.61 Methods for Chemical Analysis of Iron, Steel and Alloy; The Ammonium Phosphomolybdate Volumetric Method for the Determination of Phosphorus Content GB/T 223.62 Methods for Chemical Analysis of Iron, Steel and Alloy; The Butyl Acetate Extraction Photometric Method for the Determination of Phosphorus Content GB/T 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy; The Sodium (potassium) Periodate Photometric Method for the Determination of Manganese Content
GB/T 223.64 Methods for Chemical Analysis of Iron, Steel and Alloy; The Flame Atomic Absorption Spectrometric Method for the Determination of Manganese Content GB/T 223.67 Methods for Chemical Analysis of Iron, Steel and Alloy; The Reducing Distillation-methylene Blue Photometric Method for the Determination of Sulfur Content GB/T 223.68 Methods for Chemical Analysis of Iron, Steel and Alloy; The Potassium Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur Content
GB/T 223.69 Methods for Chemical Analysis of Iron, Steel and Alloy; The Gas-volumetric Method after Combustion in the Pipe Furnace for the Determination of Carbon Content
GB/T 223.71 Methods for Chemical Analysis of Iron, Steel and Alloy; The Gravimetric Method...

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