GB/T 31936-2015Rolls for welding steel pipe (English PDF)

Foreword

This Standard was drafted as per the rules specified in GB/T 1.1-2009.

1 Scope

This Standard specifies the technical requirements, test methods, inspection rules, mark, package, transportation, storage and quality certificate of the rolls for roll-forming straight-seam welding steel pipe.

This Standard is applicable to the forging rolls and casting rolls used in the production of roll-forming straight-seam welding steel pipe.

2 Normative Reference

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.

GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products

GB/T 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy - the Diantipyrylmethane Phosphomolybdate Gravimetric Method for The Determination of Phosphorus Content

GB/T 223.4 Methods for Chemical Analysis of Iron, Steel and Alloy - Determination of Manganese Content - Potentiometric Titration or Visual Titration

GB/T 223.5 Steel and Iron - Determination of Acid - Soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method

GB/T 223.11 Iron, Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration Method

GB/T 223.13 Methods for Chemical Analysis of Iron, Steel and Alloy - the Ammonium Ferrous Sulfate Titration Method for the Determination of Vanadium Content

GB/T 223.16 Methods for Chemical Analysis of Iron, Steel and Alloy - the Chromotropic Acid Photometric Method for the Determination of Titaninm Content

GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - the Sodium Thiosulfate Separation Iodimetric Method for the Determination of Copper Content

GB/T 223.20 Methods for Chemical Analysis of Iron Steel and Alloy - the Potentiometric Titration Method for the Determination of Cobalt Content

GB/T 223.23 Iron, Steel and Alloy-Determination of Nickel Content - the Dimethylglyoxime Spectrophotometric Method

GB/T 223.26 Iron, Steel and Alloy - Determination of Molybdenum Content - the Thiocyanate Spectrophotometric Method

GB/T 223.38 Methods for Chemical Analysis of Iron, Steel and Alloy - the Anion- Exchange Separation-Gravimetric Method for the Determination of Niobium Content

GB/T 223.43 Iron Steel and Alloy - Determination of Tungsten Content - Gravimetryc Method and Spectrophotometric Method

GB/T 223.85 Steel and Iron - Determination of Sulfur Content - Infrared Absorption Method after Combustion in an Induction Furnace

GB/T 223.86 Steel and Iron - Determination of Total Carbon Content - Infrared Absorption Method after Combustion in an Induction Furnace

GB/T 228.1 Metallic Materials - Tensile Testing - Part 1. Method of Test at Room Temperature

GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method

GB/T 230.1 Metallic Materials - Rockwell Hardness Test - Part 1: Test Method (Scales A, B, C, D, E, F, G, H, K, N, T)

GB/T 1503-2008 Cast Steel Rolls

GB/T 1804-2000 General Tolerances - Tolerances for Linear and Angular Dimensions without Individual Tolerance Indications

GB/T 1958-2004 Geometrical Product Specifications (GPS) - Geometrical Tolerance - Verification Prescription

GB/T 3177 Geometrical Product Specifications (GPS) - Inspection of Plain Workpiece Sizes

GB/T 4336 Carbon and Low-Alloy Steel - Determination of Multi-Element Contents -Spark Discharge Atomic Emission Spectrometric Method (Routine Method)

GB/T 13313 Methods of Shore and Leeb Hardness Testing for Rolls

3 Technical Requirements

4 Test Methods

4.1 The roll chemical composition shall be tested as per the provisions of GB/T 223.3,

GB/T 223.4, GB/T 223.5, GB/T 223.11, GB/T 223.13, GB/T 223.16, GB/T 223.18, GB/T 223.20, GB/T 223.23, GB/T 223.26, GB/T 223.38, GB/T 223.43, GB/T 223.85, GB/T 223.86 or GB/T 4336. Arbitration analysis shall be performed as per the provision of GB/T 223. The allowable deviation of the chemical composition shall conform to the provision of GB/T 222.

4.2 The roll pass shall be tested as per the method of A 6.5 linear contour error detection code 1-2 in Appendix A of GB/T 1958-2004; and use the pass template approved by both the purchaser and supplier to test.

4.3 The measurement of other roll geometric dimension shall be performed as per the provision of GB/T 3177.

4.4 The test of roll shape and position tolerance shall be performed as per the provision of GB/T 1958-2004.

4.5 The measurement of roll surface roughness shall adopt specimen comparison method of roughness. When measurement results are controversial, other measuring instrument can be used to measure.

4.6 The roll working surface hardness shall be tested as per the provision of GB/T 230.1; or use Richter or Shore Hardness Tester to test; the test results shall perform hardness conversion asper the provision of GB/T 13313.

4.7 The tensile strength of roll working layer shall conform to the provision of GB/T 228.1.

4.8 The impact toughness of roll working layer at room temperature shall adopt specimen with size of 10mm×10mm×55mm and without notch to test as per the provision of GB/T 229.

4.9 The measurement of roll surface quality shall adopt visual observation method.

4.10 The magnetic particle flaw detection of roll working surface shall be performed as per the provision of GB/T 15822.1-GB/T 15822.3. the same material, the same manufacturing process can be used for judgement agreed by both parties; […]