ASTM A333 Grade 6 Low Temperature Welded Structural Steel Pipe

ASTM A333 Grade 6 Cryogenic Welded Structural Steel Pipe Introduction

ASTM A333 is a piping material standard specifically designed for cryogenic environments, applicable to the manufacture of piping systems for cryogenic pressure vessels and cryogenic heat exchangers. Developed by the American Society for Testing and Materials (ASTM), this standard primarily covers seamless and welded steel pipes, widely used in equipment and systems operating in various cryogenic environments.

Materials and Specifications:

ASTM A333 includes several grades, classified as 1, 3, 4, 6, 7, 8, 9, 10, and 11 depending on the material.

Grades 6 and 3 are the most commonly used.

Outer Diameter (OD): 1/2" (21.3mm) ~ 36" (914.4mm)

Wall Thickness (WT): SCH 10S ~ XXS (2.11 ~ 60mm)

ASTM A333 Grade 6 Structural Steel Pipe Surface Quality Requirements

- The surface of the steel pipe shall be free from obvious cracks, wrinkles, scratches, delamination, and other defects. A surface defect is considered defective if its depth exceeds 12.5% ​​of the nominal wall thickness or minimum wall thickness. For steel pipes with defects, the following treatment methods may be used: grinding to remove the defect (provided the remaining wall thickness is within the specified range), repairing according to welding repair specifications, cutting off the defective pipe section within the specified length, or scrapping the pipe.

ASTM A333 Grade 6 low Temperature weld Steel Pipe Dimensions and Tolerances

This standard clearly specifies the dimensions of the steel pipe, such as outer diameter, wall thickness, length, and their corresponding tolerance ranges to ensure dimensional accuracy and interchangeability. For example, the tolerances for outer diameter and wall thickness must meet certain accuracy requirements to ensure that the steel pipe can be correctly connected and installed with other fittings or equipment.

About us

GNEE STEEL is a professional international steel export trading company, focusing on building structures, energy pipelines and other fields, providing standard and customized welded pipe solutions to global customers, and committed to becoming your reliable steel export partner.

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