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GB/T 33966-2017 English PDF (GBT33966-2017)

GB/T 33966-2017 English PDF (GBT33966-2017)

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GB/T 33966-2017: Seamless abrasion-resistant steel pipes for mortar service

This Standard specifies the designation, ordering contents, size, shape, weight, technical requirements, test methods, inspection rules, package, mark and quality certificate of the seamless abrasion-resistant steel pipe for mortar service. This Standard is applicable to abrasion-resistant seamless steel pipe for concrete, cement mortar, and slurry services.
GB/T 33966-2017
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.75
H 48
Seamless Abrasion-Resistant
Steel Pipes for Mortar Service
ISSUED ON. JULY 12, 2017
IMPLEMENTED ON. APRIL 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Designation ... 6
4 Ordering Contents... 6
5 Size, Shape, Weight ... 6
6 Technical Requirements ... 9
7 Test Methods ... 11
8 Inspection Rules ... 12
9 Package, Mark and Quality Certificate ... 13
Seamless Abrasion-Resistant
Steel Pipes for Mortar Service
1 Scope
This Standard specifies the designation, ordering contents, size, shape, weight, technical requirements, test methods, inspection rules, package, mark and quality certificate of the seamless abrasion-resistant steel pipe for mortar service. This Standard is applicable to abrasion-resistant seamless steel pipe (hereinafter referred to as steel pipe) for concrete, cement mortar, and slurry services. 2 Normative References
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 Method for Determination of Permissible Tolerance of the Chemical Composition of Steel Finished Product
GB/T 223.5 Steel and Iron - Determination of Acid-Soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.12 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium Carbonate Separation-Diphenyl Carbazide Photometric Method for the
Determination of Chromium Content
GB/T 223.14 Methods for Chemical Analysis of Iron, Steel and Alloy - The N- Benzoy-N-Phenylhydroxylamine Extraction Photometric Method for the
Determination of Vanadium Content
GB/T 223.19 Methods for Chemical Analysis of Iron, Steel and Alloy - The Neocuproine-Chloroform Extraction Photometric Method for the Determination of Copper Content
GB/T 223.23 Iron, Steel and Alloy-Determination of Nickel Content - The Dimethylglyoxime Spectrophotometric Method
Infrared Absorption Method after Combustion in an Induction Furnace (Routine Method)
YB/T 4149 Continuously Cast Round Billet for Seamless Steel Tube Rolling YB/T 5221 Alloy Structure Steel Round Tube Blank Hot Rolled and Forged for Making Seamless Tube
YB/T 5222 Quality Carbon Structural Steel Round Tube Blank
3 Designation
The steel designation consists of two parts, namely, the first capital letter of Chinese Pinyin ?€?Nai Mo?€?, NM; and specified minimum Rockwell hardness after heat treatment. Example. NM60, thereof.
NM - first capital letter of Chinese Pinyin ?€?Nai Mo?€? [Translator note. i.e. Abrasion-Resistant]; 60 - specified minimum Rockwell hardness after heat treatment.
4 Ordering Contents
The contract or order list that orders products as per this Standard shall include the following contents.
a) This Standard number;
b) Product name;
c) Steel designation;
d) Size and specification;
e) Ordering quantity (total weight or total length);
f) Delivery state;
g) Particular requirements.
5 Size, Shape, Weight
5.1 Outer diameter and wall thickness
When using vortex to test, the artificial defects of the comparative sample tube shall conform to the acceptance level E4H or E4 provisions in GB/T 7735-2016; when performing the magnetic-leaked test, the longitudinal artificial defects on the outer surface of the comparative sample tube shall conform to the acceptance level F4 provisions in GB/T 12606-2016; when using ultrasonic to test, the artificial defects of the comparative sample tube shall conform to the acceptance level L4 provisions in GB/T 5777-2008.
6.6 Surface quality
6.6.1 The inner and outer surface of the steel pipe shall be free of visible cracks, folds, rolling-folds, separation layers and scars; these defects shall be removed completely; the actual wall thickness of the removal position shall be no less than the minimum allowable wall thickness.
6.6.2 The straight allowable depth shall conform to the following provisions. a) Cold-drawing (rolling) steel pipe. no greater than 4% wall thickness; the maximum depth is 0.3mm;
b) Hot-rolling (expanding) steel pipe. no greater than 5% wall thickness; the maximum depth is 0.5mm.
6.6.3 Other local imperfections that don?€?t exceed the negative wall thickness deviation are allowed to exist.
7 Test Methods
7.1 The chemical composition analysis and sampling of steel and steel pipe shall be performed as pe the rules specified in GB/T 20066. The instrumental analysis of chemical composition shall be performed as per the provisions of GB/T 4336, GB/T 20123; the wet analysis shall be performed as per the provisions of GB/T 223.5, GB/T 223.12, GB/T 223.14, GB/T 223.19, GB/T 223.23, GB/T 223.59, GB/T 223.63, GB/T 223.69, GB/T 223.84, GB/T 223.85; however, the arbitration shall be performed as per the wet analysis.
7.2 The Rockwell hardness shall be measured near the middle of the wall thickness of the steel pipe.
7.3 The size and shape of steel pipe shall be measured by measuring gauge that meet the accuracy requirements one by one.
7.4 The inner and outer surface of the steel pipe shall be visually inspected one by one under full lighting conditions.

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