GB/T 41681-2022Y-type cast iron strainer for pipes (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted.

1 Scope

This document specifies the general requirements, technical requirements and test methods for Y-type cast iron filters for pipelines (hereinafter referred to as "Y-type filters"). Law, inspection rules, marking, packaging and storage.

This document is applicable to nominal size DN50~DN600, nominal pressure PN6~PN40, or Class75~Class300, medium temperature Y-type filter for water with a degree not greater than 80 °C or other liquids with physical and chemical properties similar to water.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 699 High Quality Carbon Structural Steel

GB/T 700 Carbon Structural Steel

GB/T 1220 stainless steel rod

GB/T 1732 Determination of Impact Resistance of Paint Films

GB/T 3098.1 Mechanical properties of fasteners Bolts, screws and studs

GB/T 3280 Stainless Steel Cold Rolled Steel Plate and Strip

GB/T 4237 Stainless steel hot-rolled steel sheet and strip

GB 5135.11 Automatic Sprinkler System Part 11: Grooved Fittings

GB/T 5210 Paint and varnish pull-off adhesion test

GB/T 5267.1 Fastener Electroplating

GB/T 6739 Paint and Varnish Pencil Method for Determination of Paint Film Hardness

GB/T 7306.2 55° sealing pipe thread Part 2: conical internal thread and conical external thread

GB/T 8923.1-2011 Visual assessment of surface cleanliness of steel surface treatment before application of paint - Part 1: Uncoated The rust grade and treatment grade of the steel surface and the steel surface after comprehensive removal of the original coating

GB/T 9124.1 Steel Pipe Flanges Part 1: PN Series

GB/T 9124.2 Steel Pipe Flanges Part 2: Class Series

GB/T 9286 Paint and varnish cross-cut test

GB/T 9441-2021 Metallographic examination of ductile iron

GB/T 10612-2003 Industrial sieve plate thickness < 3mm round hole and square hole sieve

GB/T 12221-2005 Metal valve structure length

GB/T 12227 General valve ductile iron castings technical conditions

GB/T 12229 General valve carbon steel castings technical conditions

GB/T 13452.2 Determination of film thickness of paints and varnishes

GB/T 17219 Safety Evaluation Standard for Drinking Water Transmission and Distribution Equipment and Protective Materials

GB/T 17241.6 Integral cast iron flange

GB/T 17241.7 Technical conditions for cast iron pipe flanges