Causes of Cracking of Seamless Steel Pipes

Recently, our company’s small partners often encountered customer feedback within the process of talking with customers. In their previous procurement experience, they often encountered the matter of cracking of the purchased steel pipe, which led to serious product quality problems and caused the corporate . an enormous loss. Next, Permanent Steel Manufacturing Co.,Ltd will offer you an analysis of what are the most factors that cause seamless steel pipe cracking.

What are the most factors that cause seamless steel pipe cracking? There are mainly the subsequent points:

  1. staple selection

In order to save lots of costs, some seamless steel pipe manufacturers will use round steel produced by small steel plants for processing, but the round steel produced by these small steel plants will contain many impurities, bubbles, interlayers, pores, etc., which can easily cause cracks after post-processing. problem. PMC steel pipe round bars are purchased from Baosteel, Huaigang and other high-quality round bars, and therefore the source is reliable.

  1. Inadequate heat treatment temperature control

Small manufacturers don’t have professional production experience and technology. Workshop workers cannot guarantee whether the warmth treatment of the steel pipe is in situ supported the heating temperature and duration alone, and therefore the heat treatment will change the mechanical properties of the steel pipe. However, general manufacturers don’t have clear indicators for various steel grades, wall thicknesses, mechanical properties, etc., and no testing equipment to work out whether the pipe has reached the performance indicators required by the customer.

How does PMC control production?

Each batch of steel pipes produced by PMC steel pipes has clear temperature and speed indicators for normalizing, annealing and tempering, and a tensile test are going to be administered to work out whether the merchandise meets the performance required by the customer. These data parameters are used because the basis for production So on make sure the stability of the customer’s product quality and end use, instead of just counting on the experience of a particular worker to work out , this is often the most factor why PMC steel pipe has been cooperating with many well-known enterprises within the industry for quite ten years.

  1. Straightening strength

Straightening is like secondary deformation. Two-way force is applied during straightening. If the operator isn’t experienced enough, the straightening force is just too strong, and therefore the thick-walled pipe will cause internal damage and cracks if the strength of the thick-walled pipe isn’t well controlled. this is often also the rationale for the cracking of the steel pipe within the later stage.

  1. Drawing deformation

If the drawing deformation is just too large, steel pipe cracks also will be formed, causing the steel pipe to crack during the later processing. Bright tube has low elongation, generally 7-8%, large deformation, low elongation; small deformation, high elongation. Some small manufacturers perform and perform to save lots of craftsmanship. The three deformations were changed to twoComputer Technology Articles, which expanded the deformation and caused excessive stress to cause cracking.


By Mk Faizi

I am a blogger.