Allowable deviation value of seamless pipe wall thickness

Allowable deviation value of seamless pipe (smls) wall thickness:

International standards:

According to international standards, the allowable deviation value of seamless pipe wall thickness should comply with the following regulations:

1. For seamless steel pipes with wall thickness > or = 20mm, the allowable deviation value should be within plus or minus 10%;
2. For seamless steel pipes with 2.5mm ≤ wall thickness ≤ 20mm, the allowable deviation value should be within plus or minus 12.5%;

3. For seamless steel pipes with wall thickness less than 2.5mm, the allowable deviation value should be within plus or minus 0.5mm.

International standards typically have strict requirements for the allowable deviation of seamless steel pipe wall thickness.

Domestic standards (China):

According to the relevant provisions of the domestic standard GB/T 8163-2008 "Seamless Steel Pipe", the allowable deviation value of the wall thickness of seamless steel pipes should meet the following requirements:
1. For seamless steel pipes with wall thickness > or = 20mm, the allowable deviation value should be within plus or minus 12.5%;
2. For seamless steel pipes with a wall thickness of 2.5mm ≤ 20mm, the allowable deviation should be within plus or minus 15%;
3. For seamless steel pipes with wall thickness less than 2.5mm, the allowable deviation value should be within plus or minus 0.45mm.

Domestic standards have relatively loose tolerances on the wall thickness of seamless pipes, but they still need to meet the requirements of relevant standards.

The meaning of the allowable deviation value:

The allowable deviation value for the wall thickness of seamless steel pipes refers to the acceptable gap between the actual wall thickness and the design wall thickness during production. Relevant standards specify the range of this gap, which aims to ensure the quality, stability, and reliability of seamless steel pipes during use.

The allowable deviation value of the wall thickness of seamless steel pipes is a crucial parameter. Corresponding standards and regulations exist in different countries and regions, which manufacturers and users must strictly abide by to ensure the quality and safety of seamless steel pipes.