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GB/T 16507 “Water-Tube Boilers” covers the following eight parts:
- Part 1: General Requirement;
- Part 2: Materials;
- Part 3: Structure Design;
- Part 4: Strength Calculation of Pressure Parts;
- Part 5: Fabrication;
- Part 6: Inspection, Testing and Acceptance;
- Part 7: Safety Appurtenances and Instruments;
- Part 8: Installation and Operation.
This part is Part 5 of GB/T 16507.
This part was drafted according to the rules specified in GB/T 1.1-2009.
This part partially supersedes GB/T 16507-1996 with the main technical differences as follows:
- "Terms and Definitions" were added (see Chapter 3);
- "Basic Requirements" were added (see Chapter 4);
- Fabrication of shell boilers in original Chapter 7 were deleted;
- Requirements for the assessment of bent tubes were refined;
- "Tests of Pipe-bending Process" were added (see Appendix A);
- "Additional Requirements for the Welding Procedure Qualification for Membrane Tube Panel of Boilers" were added (see Appendix B);
- "Material Classification and Grouping for Welding Procedure Qualification of Boilers" were added (see Appendix C).
This part was proposed by and is under the jurisdiction of National Technical Committee on Boilers and Pressure Vessels of Standardization Administration of China (SAC/TC 262).
Chief drafting organization: Shanghai Boiler Works Co., Ltd.
Participating drafting organizations of this part: Dongfang Boiler Group Co., Ltd., Harbin Boiler Company Limited, Babcock & Wilcox Beijing Company Ltd., Shanghai Power Equipment Research Institute, Wuhan Boiler Co., Ltd., Wuxi Huaguang Boiler Co., Ltd. and Hangzhou Boiler Group Co., Ltd.
Chief drafting staff of this part: Ye Shangyun, Jiang Xiuhua, Gu Weihong, Wang Dongping, Zhou Qiang, Zhang Qi, Zhang Rui, Lu Yi, Fu Chunxin, Zhang Shuixing, Ma Hong and Luo Fei.
The previous edition of the standard superseded by this part is as follows:
- GB/T 16507-1996.
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
中华人民共和国国家标准
GB/T 16507.5-2013
Partially supersedes GB/T 16507-1996
Water-Tube Boilers - Part 5: Fabrication
水管锅炉 第5部分：制造
1 Scope
This part of GB/T 16507 specifies requirements about the marking, cold and hot forming, expansion connection, welding and heat treatment, etc. of water-tube boilers during fabrication.
This part is applicable to the fabrication of water-tube boilers as defined in GB/T 16507.1.
2 Normative References
The following referenced documents are indispensable for the application of this part. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 985.1 Recommended Joint Preparation for Gas Welding Manual Metal Arc Welding Gas-shield Arc Welding and Beam Welding
GB/T 985.2 Recommended Joint Preparation for Submerged Arc Welding
GB/T 2652 Tensile Test Methods on Weld and Deposited Metal
GB/T 3101.1 Tolerances for Fasteners - Bolts, Screws, Studs and Nuts
GB/T 16507.1 Water-Tube Boilers - Part 1: General Requirement
GB/T 16507.2 Water-Tube Boilers - Part 2: Materials
GB/T 16507.3 Water-Tube Boilers - Part 3: Structure Design
GB/T 16507.4 Water-Tube Boilers - Part 4: Strength Calculation of Pressure Parts
GB/T 16507.6 Water-Tube Boilers - Part 6: Inspection, Testing and Acceptance
JB/T 3223 Rules of Quality Management of Welding Materials
JB/T 9626 Specification for Boiler Forging
NB/T 47014 Welding Procedure Qualification for Pressure Equipment
NB/T 47016 Mechanical Property Tests of Product Welded Test Coupons for Pressure Equipment
NB/T 47018 Technical Permission of Welding Materials for Pressure Equipment
TSG G0001 Boiler Safety Technical Supervision Administration Regulation
3 Terms and Definitions
For the purposes of this document, the terms and definitions defined in GB/T 16507.1 and the following ones apply.
3.1 Cold forming
The plastic deformation processing conducted below the recrystallization temperature of work piece material.
In engineering practice, the plastic deformation conducted below the environmental temperature are often called cold forming; and the plastic deformation processing between cold forming and hot forming are referred to as warm forming.
3.2 Hot forming
The plastic deformation processing conducted above the recrystallization temperature of work piece material.
3.3 Tube forming
The fabricating process, like pipe bending, upsetting, necking and flaring.
4 Basic Requirements
4.1 The boiler manufacturer shall have corresponding manufacturing license required in GB/T 16507.1; welding and non-destructive inspection personnel shall have corresponding qualification for personnel of special equipment and shall be trained and managed according to relevant requirements; personnel in charge of lifting and transportation shall also fulfill the qualification requirements for safety operation on the post.
4.2 The structure of boiler pressure components shall meet those specified in GB/T 16507.3 and the strength calculation shall meet the requirements of GB/T 16507.4.
4.3 The fabrication document and the qualified drawing shall meet the production condition of the manufacturer.
4.4 The fabrication of pressure components shall be in proper process and method and free from additional stress and injurious defects which will influence the safety and use.
4.5 All the equipment and instruments involved in the fabrication of boiler pressure components shall meet the given precision and be tested or corrected periodically.
4.6 Raw materials shall meet the requirements of both GB/T 16507.2 and the design drawing.
5 Marking
5.1 Material marking
5.1.1 Procedures for identifying the materials of pressure components and main bearing members shall be formulated.
5.1.2 The material marking for main pressure components of boils (drum, head, header and tubes with the nominal outside diameter larger than or equal to 219mm) shall be traceable to the material quality certificate, and for other pressure components (tubes with the nominal outside diameter less than 219mm) and non-pressure but bearing load components (supports and hangers on drums and header products) shall be easy to be identified so as to avoid the mixture of materials.
5.2 Material marking transfer
During fabrication, material marking shall be reserved. Before cutting of materials of boiler pressure components, marking shall be transferred and shall be easy to identify.
5.3 Markings in the fabrication
5.3.1 There are temporary markings and permanent markings in the product fabrication.
5.3.2 Welding markings and non-destructive testing markings shall be reserved as permanent markings; if markings are covered during fabrication or lost as the result of processing, marking transfer shall be done.
5.4 Marking method
5.4.1 The follow marking methods or their combinations shall be adopted:
a) Steel seal;
b) Vibration etching or other etching tools;
c) Marking by painting or with markers;
d) Other methods causing no damage to the safety of boilers (e.g. sticking ticket).
5.4.2 Steel impression marking shall not be used under the following conditions:
a) The tube made of stainless steel and less than 5mm in wall thickness;
b) In the area of inner and outer arcs of tube bend;
c) Materials on which steel impression marking are prohibited by the customer.
5.4.3 Positioning maps may be used if welding marking and non-destructive testing marking cannot be marked near the weld.
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Basic Requirements
5 Marking
6 Cold and Hot Forming
7 Expansion Connection
8 Welding
9 Heat Treatment
Appendix A (Informative) Tests of Tube Bending Process
Appendix B (Normative) Additional Requirements for the Welding Procedure Qualification for Membrane Panel of Boilers
Appendix C (Normative) Material Classification and Grouping for Welding Procedure Qualification of Boilers
