... ASME , EN , DIN ,GB,MaterialQ195 ,Q235,A53,A106,API 5L,SPHCApplicationPetroleum, power,gas metallurgy, papermaking, chemical, medical equipment, aviation, ... other countries and regions. Our company follows a policy of "customers first, to strive for progress," business philosophy ... , the "customers first" principle for the majority of customers with quality service. Your patronage is welcome! ...