![]() * Note: selection of pipe process type must always be made through consultation of piping engineers. Seamless pipes have better ovality or roundness, than welded pipes. Although there should be no issues with the seams of welded pipes supplied by reputable manufacturers, seamless pipes prevent any possibility of a weak seam. The main perceived advantage of seamless pipes is that they don’t have a weld seam. The internal surface of welded tubes can be checked before manufacturing, which isn’t possible with seamless. The wall thickness of welded pipes is generally more consistent than that of seamless pipes. The longer lead time required for seamless pipes can not only make timing problematic, but it also allows more time for the price of the materials to fluctuate. Welded pipes are usually more readily available than seamless. Welded pipes are typically more cost effective than their seamless equivalents. Unified Alloys typically supplies pipe in plain end form (PE), however requests for bevelled end (BE) and threaded end (TE) can be accommodated. Seamless is taking a solid bar (ingot), piercing a hole through its length and then drawing through dies to form the final size. Welded pipe is made by taking a flat plate (or skelp) which then is rolled into a tubular shape and further welded to finalize the form. Pipe is manufactured in either welded and or seamless form. Pipe is offered in 20’ lengths, but can be supplied in certain sizes in double random (+/- 40’) to meet certain project needs. The wall thicknesses are specified as ‘schedules’ which are covered within the specifications of ASTM and ASME. In piping dimensions, the inside diameter decreases as the as the wall thickness increases on all Nominal pipe sizes (NPS). is different for the 12″ and under size range. The Nominal pipe size (NPS) pertains to the pipe size by name only, as the actual outside diameter or O. The most common industry pipe sizes includes ¼” through to 12″ NPS and larger sizes typically increase in 2″ increments thereafter. Unified Alloys readily stocks various alloys and grades in sizes up to 36” Nominal Pipe Size (NPS), which meet these standards. Pipe comes in a very wide range of sizes in which with Power and Process piping, designers utilize standards controlled by organizations such as ASTM and ASME. ![]() *-Not all grades available are listed or have a full inventory managed General information Special Alloys | 2205, 254SMo, Monel, Inconel, * Schedules | 10, 10s, 40, 40s, 80, 80s, 120, 160 (Custom wall thicknesses available upon request) 22mm,25mm Round Stainless Steel Mop Pipe, 12 FEET, Thickness: 0.3. Salem Stainless Steel Suppliers Private Limited. ![]() Size Range | 1/4″ – 36″ NPS (Larger sizes available upon request) Round Stainless Steel Polished Pipe, Size: 3 to 610 mm, Thickness: 0.5 To 25 mm.
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