HYSP manufacture 6inch SCH20 Mild Welded Steel Pipes for your different application. Customer from America, South Americas, Africa countries will need 6inch SCH20 Mild Welded Steel Pipes as API 5L line pipe, ASTM A53 steel pipe. We can make mild pipes as per your different requirements.

The common standard for 6inch SCH20 Mild Welded Steel Pipes is API 5L specification, even though API 5L is line pipe standard. But because it’s popular in the global scope. So most people they require API 5L standard even for structure pipe or water pipes.  In API 5L, there are requirements strict than other steel pipe standards, like the below:

• For grades higher than Grade L290 or X42, the weld seam and the HAZ shall be heat treated so as to simulate a normalizing heat treatment, except that, if agreed, alternative heat treatments may be substituted. If such substitutions are made, the manufacturer shall demonstrate the effectiveness of the method selected using an agreed procedure. Such a procedure may include, but is not necessarily limited to, hardness testing, microstructural evaluation or mechanical testing.
• For grades equal to or lower than Grade L290 or X42, the weld seam shall be heat treated as to simulate a normalizing heat treatment, or 6inch SCH20 Mild Welded Steel Pipes shall be processed in such a manner that no untempered martensite remains.

6inch SCH20 Mild Welded Steel Pipes Specification