TSG D7002-2023Pressure Piping Components — Type Test Regulation (English PDF)

Foreword

In 2015, the Special Equipment Safety Supervision Bureau (hereinafter referred to as the Special Equipment Bureau) of the former General Administration of Quality Supervision, Inspection and Quarantine (hereinafter referred to as the former AQSIQ) issued a task letter, to revise the "Pressure piping components type test regulation" (TSG D7002-2006), which requires revision of the inapplicable provisions, based on the current "Pressure piping components type test regulation".

In May 2015, the Technical Regulations Department of China Special Equipment Testing Institute organized relevant experts to set up a drafting working group in Suzhou, formulated a drafting work plan for the revision of the "Regulations", determined the principles, key contents and main issues of the revision of the "Regulations", carried out a specific division of labor on the revision and drafting work, formulated a revision and drafting work schedule.

In August 2019, after discussion and revision, a draft of the "Regulations" was formed. In October 2019, the State Administration for Market Regulation (hereinafter referred to as SAMR) issued an announcement, to solicit opinions from grassroots departments, relevant organizations, experts and citizens.

According to the relevant requirements of the administrative licensing reform, the product range of pressure piping components, that require type testing, has changed, so the drafting work group once again supplemented and modified the content of the "Regulations". In September 2021, the State Administration for Market Regulation issued an announcement, to solicit opinions once again publicly from the entire society. In January 2022, the drafting work group held a meeting to study and discuss the opinions solicited and form a draft for review.

In February 2022, the Special Equipment Bureau formulated and revised working procedures, in accordance with the safety technical specifications; submitted the draft for review to the Special Equipment Safety and Energy Saving Technical Committee of the State Administration for Market Regulation for review. The drafting work group held a working meeting in April 2022, to study and discuss the review opinions and made revisions. In July and August 2022, the Special Equipment Bureau solicited opinions from 20 manufacturers and 8 provincial market supervision departments, respectively. The drafting work group revised it again, to form a draft for approval. In November 2022, the draft of this “Regulation” was notified to the WTO/TBT by the State Administration for Market Regulation. In December 2022, the WTO/TBT notification ended. On July 7, 2023, the “Regulation” were approved and released by the State Administration for Market Regulation.

technological progress of China's pressure piping component manufacturing level in recent years, as well as the needs of special equipment safety supervision, it clarifies the type test product range of pressure piping components; specifies the type test procedures, supervision and administration requirements, the type test items, contents, methods of pressure piping component products.

1 General provisions

2 Type test procedures and requirements

3 Supervision and administration

4 Supplementary provisions

Appendix A Type test product list of pressure piping component

Note A-1: Products, that require type testing but are not listed in this Table, can undergo type testing with reference to the requirements of this “Regulation”. In principle, the items of type testing shall not be less than those specified in this “Regulation”. Note A-2: Seamless steel pipes (thermal expansion) only need to undergo type testing, in accordance with this “Regulation”. Note A-3: Refer to steel pressure piping components. Note A-4: Seamless pipe fittings include seamed pipe fittings. Note A-5: Forged pipe fittings are type tested, in accordance with steel forged flanges. Note A-6: Low-temperature valves refer to valves, which have a design temperature lower than -46 °C. Note A-7: Regulating valves (control valves) are valves which rely on current/voltage signals to change the opening of the valve core. Pressure reducing valves (selfoperated) are valves, which rely on medium pressure or temperature, AND use the valve's own pressure reducing actuator, to stabilize the media parameters at the outlet. Note A-8: Pressure piping components, which are used as the substrate of anticorrosion piping components and constitute the component assembly device, must obtain a manufacturing license and undergo type testing or manufacturing supervision inspection, in accordance with the requirements of the corresponding safety technical specifications. […]

Appendix B Type test application form of pressure piping component

(where there are multiple manufacturing addresses, each shall be stated separately) Person in charge of the manufacturer Contact person of the manufacturer Manufacturer zip code Manufacturer fax Manufacturer contact phone number Contact person email address Equipment category Equipment type Product name Specification range (Note) Manufacturing standards (Note) Main technical parameters (Note) Test basis “Pressure piping components type test regulation” (TSG D7002-2023) Statement:

meet the type test requirements of the corresponding products; pass the self-inspection.

Note: Fill in according to the product application scope. It can attach an additional page.

Appendix C Type test items and their contents, methods and requirements of pressure

(1) Quality control of raw materials (pipe blanks), including manufacturing standards, manufacturing methods, acceptance requirements, etc.; (2) Process documents such as steel pipe forming and heat treatment; (3) Inspection and testing technology, including non-destructive testing, physical and chemical testing, process performance testing, hydraulic testing, etc. (3) Mechanical properties, including tensile test, normal temperature impact test, low temperature impact test (group IV materials in Table C-1), hardness test, etc.; (4) Steel pipe process performance tests, including flaring tests, flattening tests, bending tests, etc.; (5) Metallographic examination, including low-magnification structure, grain size, non-metallic inclusions, microstructure, etc.; (7) Non-destructive testing or hydraulic testing; (8) High-temperature tensile test, which has a temperature interval of 50 °C, within the use temperature range (up to 50 °C exceeding the maximum allowable operating temperature) (materials in groups II, III, V, VI in Table C-1), including tensile strength, yield strength, elongation after fracture, reduction of area; for oil and gas use, including shackle installation and removal tests, tensile to failure tests, hydrostatic and internal pressure to failure tests, external pressure to failure tests, air tightness tests (where applicable). Appearance and geometric dimensions, non-destructive testing, hydraulic test items can be carried out at the manufacturer’s premises. The sampling base number is generally not less than 10; randomly take 2 samples for testing. […]

Appendix D Type test items and their contents, methods, requirements for pressure

drawings (including end dimensions, local and key parts wall thickness); dimensions), welding procedure specifications, heat treatment process and other process documents; (3) Inspection and testing technology, including dimensional inspection, non- destructive testing, physical and chemical testing, etc. (4) Dimensional inspection, including end dimensions, local and key parts wall thickness; Marking, shape, appearance, dimensional inspection, pressure test, air tightness test items can be carried out at the manufacturer's premises. It shall comply with the provisions of item 2.4.3 (2) of this “Regulation”; when DN ≥ 400 mm, the sampling base number shall be no less than 3 pieces per batch. Coverage range shall meet the following conditions at the same time (1) Connection form coverage Clamp-type and ring-pressure pipe fittings can overlap each other; buttwelded pipe fittings and clamp-type and ring-pressure pipe fittings cannot overlap each other. Seamless pipe fittings and seamed pipe fittings cannot overlap each other. Tee and cross can cover each other. Elbows (bends) with small bending radius can cover elbows (bends) with large bending radius. Equal-diameter tees can cover reducing tees. Other products cannot cover each other. Materials are divided into six groups: I, Ⅱ, Ⅲ, IV, V, VI, as shown in Table C- 1; in groups I ~ III, high group materials can cover low group materials. […]

Appendix E Type test items and their contents, methods, requirements of pressure

(1) Design conditions, including usage conditions, product standards, technical requirements for special purposes; parts, as well as the compliance of the valve structural type with the design conditions; (4) Strength check calculation, including shell strength (where there is no determined value in the relevant product standards), the strength of the connection between the shells, the strength of the opening and closing parts, the strength of the opening and closing parts connections (when it is not specified in the relevant product standards), opening and closing operating force or torque, etc.; as casting method and defect acceptance level, forging method, forging level); testing, the correctness of the technical requirements; stem, the thread size of the studs (bolts) connecting the valve body and the valve cover, the size of the connection of the opening and closing assembly; (4) Valve strength test and sealing test; opens and closes under pressure for 100 times; the check valve operates without load for 20 times; the plugging plate of the plugging valve is installed and removed for 5 times; other valves open and close under pressure for 20 times; plate, stop valve disc, check valve disc, butterfly valve body or disc, seat and ball of metal sealing ball valve, etc.); (8) Antistatic performance test (when applicable); (9) Vibration resistance test (when applicable); […]