... pipeline 2. Casing Tube 3. Boiler Pipe 4. Petroleunm and natural gas industry 5. Chemistry industry 6. Electric industry Package 1 ... , ASTM A192 ASTM SA179,SA192,BS3059Seamless Steel Tubes for high pressure --Chemical fertilizer equipmentGB6479-8610, 20G, Q345, Q390, 10MoVNb, 12CrMo, 15CrMo, 12Cr2MoISO ...