Standard No.:	GB 50236-1998
English Name:	Code for construction and acceptance of field equipment, industrial pipe welding engineering
Chinese Name:	现场设备、工业管道焊接工程施工及验收规范
Chinese Classification:	P26    Metal structure engineering
Professional Classification:	GB    National Standard
ICS Classification:	23.040.01 23.040.01    Pipeline components and pipelines in general 23.040.01
Issued by:	SQTSB; SAC
Issued on:	1998-12-11
Implemented on:	1999-6-1
Status:	superseded
Superseded by:	GB 50236-2011 Code for Construction of Field Equipment, Industrial Pipe Welding Engineering
Superseded on:	2011-10-1
Abolished on:	2011-10-01
Superseding:	GBJ 236-1982 Specifications for construction and acceptance of welding work of site equipment and industrial pipelines
Language:	English
File Format:	PDF
Word Count:	22000 words
Price(USD):	440.0
Delivery:	via email in 1 business day

1 General 1.0.1 This Code is developed with a view to ensuring the quality of field equipment and industrial metal pipe welding engineering for project construction. 1.0.2 This code is applicable to the construction and acceptance of welding engineering by manual electric arc welding, argon arc welding, carbon dioxide gas arc welding, submerged arc welding and oxyacetylene welding in the material of carbon steel, alloy steel, aluminum and its alloy, copper and its alloy, industrial grade pure titanium as well as nickel and its alloy. 1.0.3 This code is no applicable to the welding engineering of boilers and pressure vessels to be assembly welded at the construction site. 1.0.4 The safety technology and labor protection for welding engineering shall comply with relevant provisions of the state’s current guidelines, policies, laws and legislations. 1.0.5 In addition to this code, the construction of welding engineering shall be in compliance with the provisions of the state’s current relevant standards and codes.

TABLE OF CONTENTS 1 General 2 General 3 Materials 4 Welding Procedure Qualification Test 4.1 General Provisions 4.2 Regulations for Procedure Qualification 4.3 Test and Qualification 5 Welders Examination 5.1 General Provisions 5.2 Content and Method of Operating Technique Examination 5.3 Assessment of Examination Test Pieces 6 Welding of Carbon Steel and Alloy Steel 6.1 General Provisions 6.2 Preparations prior to welding 6.3 Welding process requirements 6.4 Prior weld Preheating and post weld heat treatment 7 Welding of Aluminum and Aluminum Alloy 7.1 General Note 7.2 Preparation before welding 7.3 Welding procedure requirement 8 Welding of Copper and Copper Alloy 8.1 General Note 8.2 Preparation before welding 8.3 Welding procedure requirement 9 Welding of Industrial Pure Titanium 9.1 General Note 9.2 Preparation before welding 9.3 Welding Procedure 10 Welding of nickel and it alloy 10.1 General Note 10.2 Preparation before welding 10.3 Welding procedure requirement 11 Welding Inspection 11.1 Inspection before welding 11.2 Inspection during welding 11.3 Inspection after welding 11.4 Acceptance and hand over of welding Appendix A Form of PQR and WPS Appendix B Welder examination record and registration form of result as well as welder certificate Appendix C Groove Pattern and Size of Weldments Appendix D Selection of Welding Materials Appendix E X-ray Detect to Weld Seam of Aluminum and Aluminum Alloy Appendix F X-ray Test of weld of industrial pure titanium Appendix G Remarks on Wording in this Code Additional Notes Remarks on Revision