API ratings range from 2, to 20, psi cold working pressure. Click here to find out more. Class is also traditionally abbreviated CL or LB verbally spoken as pound or cross hash but not psi as this can be misconstrued as the cold working pressure CWP. Consequently in some sizes flanges are thicker to bring the rating up to the required PN rating. However there are a number of factors that can impact the pressure capability of a flange.
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ANSI B We offer immediate delivery programs for standard size of carbon steel socket weld flanges and stainless steel socket weld flanges. Socket welding flanges manufactured in special stainless steel grades, nickel alloy and alloy steel can be supplied with just in time programs from stock.
JIS Socket weld flange is similar to the slip-on flange in outline, but the bore is counter-bored to accept pipe. Socket welding pipe flanges are typically used on smaller sizes of high pressure pipes.
ASME B Socket weld pipe flanges are attached by inserting the pipe into the socket end and then applying fillet weld around the hub of the flange. This allows for a smooth bore and better flow of the fluid or gas inside of the pipe. An optional internal weld may be applied in high stress applications. We offer Raised Face socket weld flanges and Flat Face Socket weld Flanges are manufactured at our facility to companies in various industries including power generation, petrochemical plants,pharmaceutical plants , shipbuilding, oil refineries, waste water treatment plants, paper mills and turnkey projects among others.
BS4504 Plate Flange