Flanges and bolt dimensions class 150 to 2500 asmeansi b16. Gray iron pipe flanges and flanged fittings cast iron flanges, classes 25, 125 and 250 asme b 16. Asme is a notforprofit membership organization that enables collaboration, knowledge sharing, career enrichment, and. Flange to the old din standard are compatible to the new din en 10921. Our company offers a wide range of flanges like pl, sw, bl, wn,so,lj, asme ansi b16. No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise.
The resulting 1939 edition contained standards for welding neck flanges com pleted in march 1937, 1,500lb flanges in the 14in. Asme american society of mechanical engineers section viii division 1 bpv code for pressure vessel 3. Flange dimensions and material group from asme b16. Reducing flanges are available in all types and pressures. Nps 12 through nps 24 metricinch standard covers pressuretemperature ratings, materials, dimensions, tolerances, marking, testing, and methods of designating openings for pipe flanges and flanged fittings. Each specification further delineates flanges into pressure classes. Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests. For example, a cast iron asme flange is built to one set of standards, while a steel asme flange is designed to meet a different set of requirements. Weights are based on manufacturers data and are approximate.
Din flanges en flanges asme flanges jis flanges german national standards institute european standards america society of mechanical engineers. The finish of contact faces shall conform to the requirements of asme. Tested and certified according to the research and standards of the american society of mechanical engineers, these mechanical assemblies, systems, and structures bear the weight of the toughest jobs and highest expectations. Following approvals by the standards committee and asme, approval for the 1988 edition was granted by the american national standards institute on february 24, 1988. Asme is a notforprofit membership organization that. Volumes pressure vessels and piping conference asme. Standard marking system for valves, fittings, flanges, and. Pdf flanges and bolt dimensions class 150 to 2500 asme. Asme certified flanges the stamp of asme certification denotes high performance capabilities for engineered components around the world. Asme standard bolts, screws, nuts, washers, studs and other fasteners in metric and imperial sizes. They are typically made from forged materials and have machined surfaces.
Din german national standards institute din 2501 en european standard en 10921 asme american society of mechanical engineers ansi b 16. The flanges are available in different versions according to the following standards. This organization also develops standards related to flanges made from malleable iron. Pipe flanges and flanged fittings standards for engineers worldwide asme b16. Standard marking system for valves, fittings, flanges, and unions. Ansi, mss and api standards govern flange dimensions and tolerances. Engineering standards manual std342100 chapter 17pressure safety section ref references rev. Requirements and recommendations regarding bolting and gaskets are also included. Pipe flanges that are made to standards called out by asme b16.
Flange connections, flanges, design, asme standards, north sea, petroleum industry, valves comparison of leak rates predicted by rott constants with. May 02, 2006 l005 compact flanged connections edition 2, may 2006. Asme maintains dozens of flange standards, and each refers to flanges made from different materials. This standard covers pressuretemperature ratings, materials, dimensions, tolerances, marking, testing, and methods of designating openings for pipe flange and flanged fittings.
Operating instructions flanges according to din en asme. Our range of flanges finds application in industries like engineering, construction, chemical, oil field and power plant. Carbon steel pipe, fittings and flanges atlas steels. Flanges and bolt dimensions class 150 to 2500 asme ansi b16. Such markings may be shown on the body, on an attached plate, or as otherwise specified. Certain codes and standards specify mandatory product conformance markings and methods. Asme, the american society of mechanical engineers, will be the essential resource for mechanical engineers and other technical professionals throughout the world for solutions that benefit humankind. L005 compact flanged connections edition 2, may 2006. Class 150 flanges except lap joint will be furnished with 0.
Asmes boiler and pressure vessel code bpvc 20 pressure vessels, continued division 2. This standard for classes 25, 125, 250 cast iron pipe flanges and flanged fittings covers. Flange dimensions are determined by the pipe size and the pressure class required for the application. With the everincreasing industrialization, lack of interchangeability also became a problem. The standards committee that approved the code or standard was balanced to. Ansi valve standards ansi the american national standards institute standardization and conformity assessment system. The asme american society of mechanical engineers asme b16 standards cover pipes and fittings in cast iron, cast bronze, wrought copper and steel. The awwa c20701 standard describes two types of slipon flanges, ring type and hub type that may be used interchangeably if the dimensions given in the standard are used.
From the very founding of the american society of mechanical engineers asme international in 1880, discussions were held on standards for shop drawing symbols, pulleys, and line shafting, machine screws, key seats, and drawing boards. Sizes nps 12 through 312 are same as class 600 flanges. Din flanges en flanges asme flanges jis flanges german national standards institute european standards america society of mechanical engineers japanese industrial standard din 2527 din en 10921. Process valve standards australian pipeline valve asme rated valves conform to ansi asme b16. Asme american society of mechanical engineers ansi american national standard institute b 1. Engineering standards manual pd342 chapter 17 pressure safety section d20b31. The following section is in order by pressure class due to the overlapping dimensions of some standards. Boltport manufacturers asme standard fasteners in full range of material grades and specifications. Asme is the registered trademark of the american society of mechanical. Manufacturers may offer pumps rated beyond these nominal values. Flange weights, dimensions and working pressures prochem. Pressure ratings for awwa flanges range from the class b flange rated at 86 psi to the class f flange rated at 300 psi. This standard only features ansiasme flanges asme b 16.
To order a reducing flange, state the smaller size first, then the outside diameter of the larger size. Process valve standards australian pipeline valve asme rated valves conform to ansiasme b16. A a standard code name standard name ansi a126 grey iron castings for valves flanges and pipe fittings nsi a181 standard specifications for forged or rolled steel pipe flanged forged fittings and valves and parts. Flanges are standardized according publications from organizations like asme, mss, api and others. These flanges are highly durable, corrosion resistant and reliable. Flat face flanges may be provided at full thickness, c, or with raised face removed the latter is nonstandard. Pdf asme b16 5 20 pipe flanges and flanged fittings nps 1. The asme american society of mechanical engineers asmeansi b16 standards covers pipes and fittings in cast iron, cast bronze, wrought copper and steel. Api 5791asme ffs1 fitnessforservice three standards from the b1 series on screw threads nine standards from the b16 series on pipe flanges and fittings four standards from the b18 series on hex bolts b36. Asme procedures and policies, which precludes the issuance of interpretations by individuals. Flanges may be cast, forged, or plate for blind flanges only materials, as listed in table 1a. Asme, the heating and piping contractors national association. Bolted flanges, metals, flanges, algorithms, asme standards, design, manufacturing, pressure vessels, stress analysis engineering effects of scatter in bolt preload of pipe flange connections with gaskets on sealing performance.
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