1, Seamless or Welded Pipe fitting 2,SIZE: 1/2"--48"(DN15-- ... /316L,317L,321,310S,S31803,2507 seamless pipe fitting Features: 1) Type: butt welded and seamless ... pipe fitting2) Size: DN15-DN1200 (1/2"-48"). ... foodstuff, power, papermaking, chemical, medical equipment, aviation, boiler heat exchanger, and other fields.7) Packing: Fumigation-free plywood cases ...