Tube Products Incorporate offers Stainless Steel Made Welding Neck. Tube Products Incorporate is an ISO 9001:2008 certified company. The company also manufactures and supplies carbon steel, stainless steel and alloy steel pipe fittings, flanges, piping spools and bulk pipes and plates. The Stainless Steel Made Welding Neck has outer diameter of 24". The Stainless Steel Made Welding Neck is also made of carbon steel and alloy steel. This Welding Neck is available in sizes ranging from 1/2" NB to 48" NB.