1.natural gas pipe 2.material:ST37,ST35. ... 2448 3.ISO and SGS certificate "strong horse with strong saddle". the sophisticated equipment make HONRY' ... papermaking, chemical, medical equipment, boiler heat, exchanger, gas metallurgy, etc.Min Order Quantity1 tonsDelivery Time25 days after ... to requirement2.anti-corrosion and high-temperature resistant with black painting3. All the production process are ...