Carbon steel pipe fittings pressure rating

Carbon steel pipe fittings are produced from carbon steel. Carbon steel or plain steel has iron and carbon. There are other elements present in carbon steel but in lower quantities. The allowed elements are manganese, silicon and copper. Depending on the mixture and standards, this material can have different strength and pressure containment capacities. The pipes have pressure ratings that allow the customers to select the needed pressure containment capacities. The carbon steel pipe fittings are rated in psi or MPa. Carbon steel pipes and fittings range from 15000 psi to 23000 psi depending on their standards. Different standards of pipes have different pressure ratings. The A234 carbon steel pipe fittings for example can have 150LBS to 9000LBS. The difference in pressure ratings is mainly due to the wall thickness and the diameter of the pipes or fittings.

The diameters and wall thicknesses are governed by standards such as B16.9, B16.11 and so on. There are different makes, shapes, sizes and types of pipe fittings. The carbon steel buttweld fittings are stronger. They could be easily welded with each other and form a stronger connection. The material composition plays a major role in welding and high carbon fittings are vulnerable to carbide precipitation and can increase intergranular corrosion. There are wrought carbon steels such as the ASTM A234 material. It could be produced either seamless or welded. The prices of ASTM A234 Gr WPB may differ based on the standards, pressure ratings, wall thicknesses and market factors as well.