GB/T 3420-2008 in English

1 Scope

This standard specifies the classification, dimension, appearance, weight, technical requirements, test methods, inspection rules, marking, packing, quality certificate, transportation and storage of the cast iron pipe fittings.
This standard is applicable to the gray cast iron pipe fittings with socket connection and flange connection and the gray cast iron pipe fittings with flexible mechanical joint, both for transmitting water and coal gas. The use of cast iron pipe fittings shall refer to relevant piping design technical requirements and construction specifications.
Pressure flange, bolt, hexagonal nut, rubber ring and supporting ring used for flexible mechanical joint gray cast iron pipe fittings shall meet the requirements of Appendix A, Appendix B and Appendix C in GB/T 6483-2008.

2 Normative References

The following standards contain provisions which, through reference in this text, constitute provisions of this part. For dated references, all subsequent modifications (excluding correction contents) or revisions are not applicable to this standard. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest editions of the normative documents are applicable to this Part.

Contents
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
5 Dimension, Appearance, Weight and Allowable Deviation
6 Technical Requirements
7 Test Methods
8 Inspection Rules
9 Packing, Marking, Quality Certificate, Transportation and Storage