Procurement in this industry may sound relatively lucrative, but it is actually quite demanding. Buyers also bear considerable hardship: after a project comes through, there are many materials they have never even seen, which they must study. Below Black-Jacketed Direct-Buried LSAW Pipe Here are several points to note when purchasing LSAW pipe.
I. Purchasing Requires Understanding Steel Pipe Types
1. By type: LSAW pipe, seamless steel pipe, spiral steel pipe, etc.
2. Classification of LSAW pipe by cross-sectional shape: square tube, rectangular tube, oval tube, flattened oval tube, semicircular tube, etc.
II. Several Points to Note
In the early days of the steel-pipe industry, deceptive practices were relatively common; now people are more familiar with the industry, so those tricks can be identified with the naked eye.
1. Insufficient wall thickness concealed by flaring the pipe end: the end is hammered to look thicker, but measurement with instruments reveals the truth.
2. Passing LSAW pipe off as seamless pipe: LSAW pipe has only one longitudinal weld. The entire pipe is machine-ground—commonly called polishing—so that it looks seamless and is passed off as seamless pipe.
3. Nowadays there is also a rather sophisticated method: so-called seamlessized steel pipe, which is actually hot-expanded steel pipe. After expansion there is lead powder inside, and there are burning traces on the outside, and the weld cannot be seen. Many relatively large steel pipes use this type of pipe to pass as seamless pipe in order to pursue high profits.
4. Using polished girth-welded LSAW pipe to pass as seamless steel pipe.
That concludes several points to note when purchasing LSAW pipe. We hope it is helpful. For more information, please follow us. Black-Jacketed Direct-Buried LSAW Pipe
