Sincerely hope we become long-term partners - Steel pipe & Fittings:

The company's main business: oil cracking tube , fertilizer special tube, high pressure boiler tube, alloy steel pipe and other high-quality steel! 
Petroleum cracking tube standard: GB9948-2006—China national standard Petroleum cracking tube
Petroleum cracking tube manufacturing process: hot rolled petroleum cracking tube , cold drawn oil cracking tube , thermal expansion oil cracking tube
GB9948 petroleum cracking tube Use: used in petroleum refinery Furnace tubes, heat exchanger tubes and tubes for pipes.  
Petroleum cracking tube main production Grade: 10,20,15CrMo, 1Cr2Mo, 1Cr5Mo, 
GB / T9948-2006 petroleum cracking tube Delivery Status: 10,20 <Hot oil cracking tubes finish rolling, drawing oil cracking tubesnormalizing> 15CrMo petroleum cracking tube <tempering finishing hot-rolled tubes, cold drawn tubes normalizing and tempering> 1Cr2Mo petroleum cracking tube <tempering finishing hot-rolled tubes, cold drawn tubes normalizing and tempering> 1Cr5Mo petroleum cracking tube < Annealing >  
Petroleum cracking tube weight calculation formula (outer diameter - wall thickness) X wall thickness X0.02486 = KG / M