HG/T 3985-2007 (English Version) PDF

Scope: This standard specifies the terms and definitions, classification and naming, requirements, test methods, test rules, signs, labels, packaging, transportation and storage of polytetrafluoroethylene corrugated pipe expansion joints (hereinafter referred to as expansion joints). This standard is applicable to polytetrafluoroethylene as the flow-through part, the nominal pressure PN is not greater than 1.6MPa, the nominal size DN25mm ~ 1000mm, and the medium is sulfuric acid, hydrochloric acid, hydrofluoric acid, benzene, alkali, aqua regia, and organic solvents of various concentrations. It is an expansion joint that is highly corrosive to gases and liquids such as reducing agents and reducing agents, and has an operating temperature of -50°C to 180°C. It acts as a flexible compensation for pipelines. This standard does not apply to expansion joints with molten alkali metal sodium and potassium, chlorine trifluoride and gaseous fluorine media.

HG/T 3985-2007 Referenced Document

GB 191 Packaging--Pictorial marking for handling of goods
GB/T 10111 Generation of random numbers and procedures applied to sampling inspection for product quality*， 2008-07-28 Update
GB/T 1047-2005 Pipework components-Definition and selection of DN (nominal size)
GB/T 1048-2005 Pipework components-Definition and selection of PN
GB/T 12777-1999 General specification for metal bellows expansion joints
GB/T 13384 General specifications for packing of mechanical and electrical product*， 2008-07-18 Update
GB/T 14436 General principles of industrial product guarantee documents
GB/T 1804-2000 General tolerances Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 2828.1-2003 Sampling procedures for inspection by attributes--Part 1: Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection
GB/T 2829-2002 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
GB/T 4240 Stainless steel wires*， 2019-06-04 Update
GB/T 6388 Transport package shipping mark
GB/T 8923-1988 Rust grades and preparation grades of steel surfaces before application of paints and related products
GB/T 9122-2000 Loose plate steel pipe flanges with lapped end
GB/T 9124-2000 Specification for steel pipe flanges
HG/T 2902 Polytetrafluoroethylene molding powder