... 35mm 6).Length:4m-12m,also can be manufactured according to customers'requirements7).Type:Seamless8).Ends:Plain ends or bevel ... oil,black paint or varnish,also can be required according to customers'requirements10).Test equipments:X-ray detector,ultrasonic wave detector ... Korea,Japan,Egypt,Yemen,Saudi Arabia,Kuwait,Czech,Indonesia and other countries . Seamless Carbon Steel Boiler Tubes (ASME SA192)