Detailed Product Description Name:Seamless steel tubes for liquid service(1)Standard: GB8163-99(2) ... pipes for engineering and large-scale equipment.Our company also professionally provide ASTM A53,ASTM A106,AP25L,API5CT, GB8162, GB8163, GB3087, seamless steel ... pipe. we also supply an extensive range of steels, such as" angles, flat steel, square steel, welded pipe, ...