... 1240*1-200apply to oil, chemical, electric, boiler industry for high and low temperature, corrosion condition Stainless ... .5-60apply to oil, aviation, smelt, food, water conservation, electric, chemical, medicine industryLow temperature steel tube16MnDG ... .232-1240*3-100apply to oil, gas, water, oxygen transport in oil and gas industry ERW ... transport Big Size Seamless Steel Pipes For Boiler ASTM A335P12