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  2. GB/T 31937-2015 in English
GB/T 31937-2015 in English

GB/T 31937-2015 in English

VALID

SAWL steel pipe for pipeline of coal slurry

  • Issued on:2015-09-11
  • Implemented on:2016-06-01
  • File Format:PDF
  • Delivery:Via email within 1~3 business days
Price(USD)： $250.00
$243.00
Standard No: GB/T 31937-2015
Document status: VALID
Title in English: SAWL steel pipe for pipeline of coal slurry
Title in Chinese: 煤浆输送用直缝埋弧焊钢管
Language: English
File Format: Electronic (PDF)
Delivery: Via email within 1~3 business days
Issued on: 2015-09-11
Implemented on: 2016-06-01
ICS Classification: 77.140.75-Steels pipes and tubes for specific use
Chinese Classification: H48-Steel tube and cast iron pipe
Professional Classification: GB-National Standard
Related Keywords: coal slurry pipeline
coal slurry
coal slurry transportation
sawl steel pipe
coal slurry introduction
Related Topics: GBT31937
GB/T 31937-2015
submerged arc welding
Latest specifications for spiral seam submerged arc welded steel pipes for urban heating
Straight seam electroplated steel pipe

《GB/T 31937-2015煤浆输送用直缝埋弧焊钢管》由TC183（全国钢标准化技术委员会）归口，TC183SC1（全国钢标准化技术委员会钢管分会）执行，主管部门为中国钢铁工业协会。
本标准规定了煤浆输送工程用直缝埋弧焊接钢管的钢级表示方法;订货内容;尺寸、外形、重量及允许偏差;技术要求;试验方法;检验规则;包装、标志和质量证明书。
本标准适用于6mm~40mm 壁厚的煤浆输送工程用直缝埋弧焊接钢管(以下简称“钢管”)


Introduction

1. Background of standard formulation and analysis of technological evolution

With the development of the coal industry, coal slurry, as an efficient energy carrier, is increasingly in demand in the field of transportation. The formulation of GB/T31937-2015 aims to standardize the technical requirements of straight seam submerged arc welded steel pipes for coal slurry transportation to ensure their safety and reliability. This standard combines domestic and foreign technical experience and refers to international standards such as API Specification 5L, reflecting the progress and evolution of domestic steel pipe manufacturing technology.

2. Comparative analysis of standard frameworks

Standard dimensions GB/T31937-2015 API Specification 5L SY/T6423 series
Steel grade representation method LxxxJ/XyyJ A, B, C, D series N/A
Chemical composition requirements Clear limits for carbon, manganese, silicon, etc. Similar to GB/T31937 Supplementary nondestructive testing requirements
Manufacturing process LSAW Supports multiple welding methods Emphasis on non-destructive testing technology

3. Interpretation of the main contents of the standard

3.1 Steel grade representation method

The standard adopts a double grade system, such as L450J/X65J. Among them, 'L' represents coal slurry pipeline, the number is the lower limit of yield strength, 'X' represents pipeline steel, and the letter represents the purpose. This naming method of LSAW steel pipe is easy to identify and classify.

3.2 Technical requirements

The standard specifies the dimensional deviation, surface quality and mechanical properties of LSAW steel pipes for coal slurry transportation projects. Among them, the allowable deviation of wall thickness is ±10% to -3%, and the weight deviation of a single steel pipe shall not exceed +10%.

3.3 Test methods

Including tensile test, Charpy impact test, drop weight tear test and ultrasonic flaw detection. For example, the hydrostatic test pressure calculation formula is P=2ST/D, which must comply with the provisions of Table 8.

4. Implementation suggestions

  1. Material selection: Select the appropriate steel grade according to the transportation conditions to ensure that its mechanical properties meet the requirements.
  2. Manufacturing: Use advanced straight seam submerged arc welding technology and strictly control welding parameters.
  3. Detection: Carry out non-destructive testing and performance tests in accordance with standard requirements to ensure product quality.
  4. Application: In coal slurry transportation projects, it is recommended to regularly check the status of steel pipes to prevent corrosion and mechanical damage.

More samples: JJG 21-2008 YD/T 3934-2021 JGJ 94-2008
Sample only — not a preview of GB/T 31937-2015
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