ERW Steel Pipe—Electric Resistance Welded Steel Pipe is made of hot-rolled steel coils/sheets that have been put in a process know as cold roll forming. The obvious advantage of ERW steel pipe compared to seamless steel pipe is the uniform wall thickness. According to API standard or GB/T9711.1 standard, both ends of the steel pipe are beveled and length can be fixed as required.
SSAW steel pipe means spiral pipe, which is made of hot-rolled steel plates.
Generally price for SSAW steel pipe is lower than that of ERW steel pipe and LSAW steel pipe when it comes to the same steel grade and standard. SSAW steel pipe is usually used to transfer water, oil, or gas due to the big size.
