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SN/T 4367.2-2016Rules for the inspection of steel pipe for import and export--Part 2: Seamless boiler tubes (English PDF)

进出口钢管检验规程 第2部分:无缝锅炉管

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Issued by

General Administration of Customs

Level / Type

National · Recommended

Issue date

August 23, 2016

Implementation date

March 1, 2017

Scope

SN/T 4367.2-2016 is the English-translated version of 进出口钢管检验规程 第2部分:无缝锅炉管.

SN/T 4367.2-2016 — This part of SN/T 4367 specifies the inspection requirements and implementation procedures for inspection and supervision of seamless boilers for import and export.

This section applies to all kinds of boilers, superheaters, exchangers, heat exchangers and pressure piping and other uses of seamless steel tubes.

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Document preview — SN/T 4367.2-2016

National Standard of the People's Republic of China

Classification
H 48

Issued by: General Administration of Customs

Contents

  • Foreword
  • 1 Scope
  • 2 Normative references
  • 3 Terms and Definitions
  • 4 Inspection
  • 4.1 Inspection basis
  • 4.2 Sampling
  • 4.4 Appearance Inspection
  • 4.5 Specifications Inspection

Foreword

The serial standards of SN/T 4367 "Inspection Rules for Import and Export Steel Pipes" are divided into 8 parts.

--- Part 1. Welded boiler tubes;

--- Part 2. Seamless boiler tubes;

--- Part 3. Oil and gas pipeline seamless pipe;

--- Part 4. Oil and gas pipelines;

--- Part 5. Geological oil drilling seamless pipe;

--- Part 6. Welded steel pipe for low pressure fluid delivery and galvanized welded steel pipe;

--- Part 7. Wire bushings;

--- Part 8. Anisotropic steel pipe.

This section is Part 2 of SN/T 4367.

This section is written in accordance with the requirements of GB/T 1.1-2009.

This part is proposed and managed by the National Certification and Accreditation Regulatory Commission.

1 Scope

This part of SN/T 4367 specifies the inspection requirements and implementation procedures for inspection and supervision of seamless boilers for import and export.

This section applies to all kinds of boilers, superheaters, exchangers, heat exchangers and pressure piping and other uses of seamless steel tubes.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article Pieces. For undated references, the latest version (including all amendments) applies to this document.

SN/T 0188.2 Procedures for the weighing of import and export commodities weighing instruments Part 2. General rules for weighing instruments SN/T 1323 Sampling procedures for metal materials for import and export SN/T 2412.3 General Inspection Regulations for Imports and Exports of Steels Part 3. Sampling Locations and Dimensions SN/T 2412.4 General Inspection Regulations for Imports and Exports of Steel - Part 4. Preparation Requirements

3 Terms and Definitions

The terms and definitions defined in SN/T 1323, SN/T 2412.3 and SN/T 2412.4 apply to this document.

4 Inspection

4.1 Inspection basis

The content, items and methods of seamless boiler tube inspection shall be based on the national technical regulations, mandatory requirements of technical specifications, trade contracts and the requirements specified in the product standard of the joint boiler tube shall be determined. See Appendix A for the standard of common seamless boiler tubes.

4.2 Sampling

Sampling according to SN/T 1323 or related product standards.

For laboratory tests, the sampling site and size shall comply with the relevant product standards or SN/T 2412.3.

4.3 On-site inspection the on-site inspection includes checking whether the names, marks, marks, etc. of seamless boiler tubes are consistent with the declaration documents.

4.4 Appearance Inspection

Visually inspect the surface of the seamless boiler tubes for defects such as cracks, scabs, and folds. Appearance inspection of seamless boiler tube as a matter of fact, it can be checked with the aid of instruments if necessary.

4.5 Specifications Inspection

Calibrate the outer diameter, wall thickness, length, straightness, roundness, end face, etc. of seamless boiler tubes using calibrated rulers, calipers, and micrometer gauges

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 7 pages — is available in the English PDF.

Referenced standards

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