Spiral welded pipe Standard: API 5L/5CT, GB/T9711.1, GB/T9711.2, SY/T3087-1999, SY/T5037-2000 Meterial: Q235-345, L175-485, SS400, L290-360 Dimensions:219-2420*6-20mm Usage: Main using the oil,natural gas,industry transport burning liquid and no-burning liquid and steel structure. We can supply all kinds of seamless steel pipes,steel bars,steel coil,U-ahannel and Angle steel.Please contact me if you have any requirements in this line of the products. I will give you the offer in the first time.