GB/T 3420-2008 English PDF

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GB/T 3420-2008: Gray iron castings for pipe fittings
Status: Valid

GB/T 3420: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 3420-2008	1499	Add to Cart	10 days	Gray iron castings for pipe fittings	Valid
GB/T 3420-1982	RFQ	ASK	9 days	Gray iron castings for pipe fittings	Obsolete

Similar standards

GB/T 3091   GB/T 3093   GB/T 3639   GB/T 9948   GB/T 3422   

Basic data

Standard ID: GB/T 3420-2008 (GB/T3420-2008)
Description (Translated English): Gray iron castings for pipe fittings
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H48
Classification of International Standard: 77.140.75
Word Count Estimation: 68,638
Date of Issue: 2008-10-10
Date of Implementation: 2009-05-01
Older Standard (superseded by this standard): GB/T 3420-1982; GB/T 8715-1988
Quoted Standard: GB/T 223.61; GB/T 223.68; GB/T 228; GB/T 231.1; GB/T 3422; GB/T 6483
Regulation (derived from): National Standard Approval Announcement 2008 No.17 (Total No.130)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the classification of cast iron pipe fittings, dimensions, shape, Weight, technical requirements, test methods, inspection rules, signs, packaging and quality certification, transport and storage. This standard applies to transport water and gas connections and flange socket with a gray cast iron pipe and cast iron pipe fittings flexible mechanical connections. Cast iron pipe fittings should refer to the relevant technical requirements of piping design, construction specifications. Bolt, , hexagonal nut, apron, supporting ring by GB/T 6483-2008 Appendix A, Appendix B, Appendix C of the regulations Portland flexible mechanical cast iron pressure pipe fittings used.

GB/T 3420-2008: Gray iron castings for pipe fittings

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Gray iron castigs for pipe fittings ICS 77.140.75 H48 National Standards of People's Republic of China Replacing GB/T 3420-1982, GB/T 8715-1988 Gray cast iron pipe fittings Posted.2008-10-10 2009-05-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

This standard replaces GB/T 3420-1982 "gray cast iron pipe fittings" and GB/T 8715-1988 "flexible mechanical interface cast iron pipe fittings" After the standard name for "gray cast iron pipe fittings." This standard compared with GB/T 3420-1982 and GB/T 8715-1988 main changes are as follows. --- Added a new foreword, directory and other content. --- Some of the standard terms are defined. --- Increased classification of the pipe. --- Test pressure on the gas pipe was modified. This standard is proposed by China Iron and Steel Association. This standard by the National Steel Standardization Technical Committee. This standard is mainly drafted by. Beijing Shougang Huayu Foundry, Harbin Pipe Factory. The main drafters of this standard. Jia Yanming, Huang Jianmin, Gu Hong, Zhao Shuming, Wang Bolong. This standard replaces the standards previously issued as follows. --- GB/T 3420-1982; --- GB/T 8715-1988. Gray cast iron pipe fittings

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. 3.1 End bearing, socket or flange, bore uniform, axis line castings. Does not include as a tube of the bearing sleeve, plate bearing tube. 3.2 Pipeline can be deflected, change direction or diameter, different from the straight castings. 3.3 Circling body with bolt holes distributed along the circumference and perpendicular to the axis of the pipe or tube. 3.4 Parts that connect mating or tube sockets. 3.5 Convex port for tube or fitting. 3.6 The female port of the tube or tube is connected to the socket of the next part. ......

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