... 2.round,square,rectangular 3.seamless and welded 4.payment: The Stainless Steel Seamless Pipe1) Grades: TP304, TP304L, TP310/S, TP316L ... , boiler and heat exchanger and instrumentationApplications range: For use in the petroleum, smelting, foodstuff, power, papermaking, chemical, medical equipment, aviation, boiler ...