This Code applies to the facilities, technology and inspection for manufacturing of buried type polyethylene plug valves and buried type polyethylene ball valves for liquefied petroleum gas or city gas (hereinafter referred to as “PE valves”) in conformity to the service conditions in following (1) to (3) among piping valves in conformity to the Enforcement Regulation of the Safety Control and Business of Liquefied Petroleum Gas Act (hereinafter referred to as “Act”), Table 3, No. 6 and Table 7, No. 4, f. <Revised on December 10, 2015>
(1)The service temperature is not less than -29 ℃ and not over 38 ℃.
(2)The working pressure is not over 0.4 MPa.
(3)The valves are in service in a state buried underground.
1. General 1
1.1 Scope 1
1.2 Validity of Code 1
1.3 Reference Codes and Standards
1.3.1 Inspection standard for new technology products
1.3.2 Manufacturing registration standard for foreign products 1
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2
1.4 Definitions 2
2. Manufacturing Installation Standard
3
2.1 Manufacturing Facilities 3
2.2 Inspection Facilities 3
3. Manufacturing Technology Standard 4
3.1 Design (currently not used) 4
3.2 Materials 4
3.3 Thickness (not applicable) 5
3.4 Construction and Dimensions 5
3.5 Fabrication (not applicable) 6
3.6 Welding (not applicable) 6
3.7 Heat treatment (not applicable) 6
3.8 Performance 6
3.8.1 Product performance 6
3.8.2 Material performance
3.8.3 Operating performance 6
6
3.9 Marking 7
3.9.1 Product marking 7
3.9.2 Acceptance marking 8
4. Inspection Standard 8
4.1 Kinds of Instructions 8
4.1.1 Manufacturing installation inspection 8
4.1.2 Product inspection 8
4.2 Object Audit of Process Inspection
4.2.1 Application for audit
4.2.2 Audit method
4.2.3 Adjudication committee 11
11
11
12
4.3 Inspection Items 12
4.3.1 Manufacturing installation inspection 12
4.3.2 Product inspection 12
4.4 Inspection Method 15
4.4.1 Manufacturing installation inspection 15
4.4.2 Product inspection 15
4.5 Other Inspection Standards 19
4.5.1 Inspection of imported products 19
4.5.2 Partial omission of inspection 19
4.5.3 Disposal of rejected products (not applicable)
4.5.4 Detailed inspection standards 19
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Appendix A. General Standard for Operation of Quality Control System for Gas Appliance Manufacturing Plants
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