High pressure seamless steel pipes. The annual production can reach 200, 000tons. The diameter range is from 150mm-1600mm and thickness is from 8mm-220mm. Standard: API, ASME, DIN, JIS, GB...According to customer requirements; Material: Carbon steel, Austenitic stainless steel, Alloy, Titanium, Nimonic, etc.; OD: DN10mm~4000mm; Thinckness: 3~220mm; SCH: SCH10~160XXS; Length: Specified length, random length, customized; Application: Oil, gas, petrochemical, electric power, etc.