GB/T 26500-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 26500-2025	RFQ	ASK	3 days	Structure, main size and basic parameters of steel pipes and fitting lined with plastic	Valid
GB/T 26500-2011	399	Add to Cart	3 days	General technical specification for pipes and fittings lined with fluoroplastics	Valid

Basic data

Standard ID: GB/T 26500-2025 (GB/T26500-2025)
Description (Translated English): Structure, main size and basic parameters of steel pipes and fitting lined with plastic
Sector / Industry: National Standard (Recommended)
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 26500-2011

GB/T 26500-2011: General technical specification for pipes and fittings lined with fluoroplastics

---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.
General technical specification for pipes and fittings lined with fluoroplastics ICS 71.120; 83.140 G94 National Standards of People's Republic of China Fluorine plastic lined pipe, fittings common technical requirements Issued on. 2011-05-12 2011-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions Categories 4 and structure 2 5 material 9 Design 9 6 7 requires 10 8 10 Test Method 9 inspection rules 11 10 signs, packaging, transportation and storage 12 References 13

Foreword

This standard ASTMF1545-1997 (2003 was re-confirmed) "plastic-lined pipe, fittings and flanges requirements specification" is consistent The degree of non-equivalent. The main differences are as follows. --- ASTMF1545 standard plastic liner materials include PP and PVDC, this standard does not include PP and PVDC; --- ASTMF1545 standard fluorine plastic lining material total of six species of this standard combined into five (this standard will ASTMF1545 Two PVDF combined into one); --- ASTMF1545 standard pipe sizes are imperial, metric conversion of this standard, and conducted a round; --- ASTMF1545 standard flange rating is 125 lbs, 150 lbs, 300 lbs, the present standards into Chinese standard flange grade; --- ASTMF1545 standard nominal pipe sizes 1 "to 24", this standard is 25mm ~ 600mm; --- ASTMF1545 standard pipe products is no specific structure size, this standard be increased; --- ASTMF1545 standard test methods including the standard test method for a direct reference to the chemical industry standard test method. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Non-metallic chemical equipment Standardization Technical Committee (SAC/TC162) centralized. This standard was drafted. Wenzhou Zhao Teflon Co., Tianhua Chemical Machinery and Automation Research Institute, Wenzhou City Fusu equipment manufacturers Factory, Wenzhou Superstar plastic composite factory, Wenzhou City Quality and Technical Supervision and Inspection Institute, the Institute of Wenzhou specialty plastics. The main drafters of this standard. Zhao Jun, Zhao Wei, CHEN Guo, Zhang Branch, Chen Lie, Lin Ruihua, should love, Li Guolin. Fluorine plastic lined pipe, fittings common technical requirements

1 Scope

This standard specifies the fluorine plastic lined steel pipe, product classification and structural fittings, materials, design, requirements, test methods, inspection rules and standard Chi, packaging, transport and storage. This standard applies to a metal shell and fluorine plastic lining consisting of a straight pipe and tube products. Fluoroplastic comprises polytetrafluoroethylene (PTFE), Fluorinated ethylene propylene (FEP), polyvinylidene fluoride (PVDF), and ethylene tetrafluoroethylene copolymer (ETFE), fusible polytetrafluoroethylene Ene (PFA). This standard applies to the design pressure of not more than 2.5MPa; using the medium for gases, liquefied gases, vapors or flammable, explosive, toxic, rot Corrosion resistance, maximum operating temperature greater than or equal to the standard boiling point of liquid; and the nominal size range DN25mm ~ DN600m pipeline. This standard also applies to the medium, working conditions, the diameter of the negative pressure-resistant pipe.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Repair orders (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 1047-2005 conduit element DN (nominal size) of the definition and selection GB/T 1048-2005 conduit elements PN (nominal pressure) of the definition and selection GB/T 8163-2008 Seamless steel tubes GB/T 12229-2005 General valves carbon steel castings GB/T 12459-2005 steel welded seamless pipe fittings GB/T 13401-2005 steel plate pipe fittings GB/T 14976-2002 fluid transport stainless steel seamless pipe HG/T 2902-1997 molded PTFE resin HG/T 2904-1997 and extrusion molding with poly FEP resin HG/T 4089 plastic lining Hydraulic pressure test equipment HG/T 4090 plastic lining equipment spark test methods HG/T 4091 plastic lining equipment temperature test methods HG/T 4092 Test methods for thermal expansion and contraction of plastic lining equipment HG/T 4093 plastic lining equipment lining resist negative pressure test method HG/T 20592-2009 steel pipe flanges (PN series) HG/T 20615-2009 steel pipe flanges (Class Series) ASTMD3159-2006 modified ETFE molding and extrusion material specification (StandardSpecificationforModifiedET- FE-FluoropolymerMoldingandExtrusionMaterials) ASTMD3222-2005 unmodified PVDF molding, extrusion and spraying material specification [StandardSpecificationfor UnmodifiedPoly (VinylideneFluoride) (PVDF) MoldingExtrusionandCoatingMaterials] ASTMD3307-2006 PFA molding and extrusion material specification [StandardSpecificationforPerfluoroalkoxy (PFA) -FluorocarbonResinMoldingandExtrusionMaterials]

3 Terms and Definitions

The following terms and definitions apply to this standard. ......

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