Construction

ASTM A139 is a standard specification for electric-fusion (arc)-welded steel pipe (NPS 4 and over).

API 5L X70 PSL2 pipes are widely used in the oil and gas industry, including oil and gas fields, refineries, natural gas transportation and other fields.

The specification covers grades of stainless steel tubing for general corrosion-resisting and low or high-temperature service.

ASTM A335 P92 seamless ferritic alloy steel pipe is a seamless ferritic alloy steel pipe produced according to ASTM A335 standard, also known as T92 seamless steel pipe.