GB/T 3420-2008Gray iron castigs for pipe fittings (English PDF)

1 Scope

This standard specifies the classification of cast iron pipe fittings, size, shape, weight, technical requirements, test methods, inspection rules, signs, packaging and quality

Certificate, transport and storage.

This standard applies to the transmission of water and gas used to connect the socket and flange connections gray cast iron pipe fittings and flexible mechanical interface cast iron pipe fittings.

The use of cast iron pipe fittings should refer to the technical requirements of pipe design, construction specifications.

Flexible mechanical interface cast iron pipe used by the pressure Lan, bolts, hex nuts, apron, support ring according to GB/T 6483-2008 Appendix A,

Appendix B, Appendix C of the implementation.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. All dated references, which are subsequently owned

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to reach an agreement based on this standard research

Whether you can use the latest versions of these files. For undated references, the latest version applies to this standard.

Methods for chemical analysis of iron, steel and alloy - The ammonium phosphomolybdate volumetric method for the determination of phosphorus content

GB/T 223.68 Methods for chemical analysis of iron, steel and alloy - The potassium iodate titration method after combustion in tube furnace for the determination of sulfur content

GB/T 228 metal materials at room temperature tensile test method (GB/T 228-2002, eqv ISO 6892..1998)

GB/T 231.1 Brinell metal hardness test - Part 1. Test methods (GB/T 231.1-2002, eqv ISO 6506-1..1999)

GB/T 3422 continuous cast iron pipe

GB/T 6483 flexible mechanical interface gray cast iron pipe

3 Terms and definitions

The following terms and definitions apply to this standard.