The dimensions of flanges in piping systems and also the smaller flanges on equipment are standardized. Forged or rolled alloy steel pipe flanges, forged fittings, and valves and parts. However, despite being referred to extensively by engineers, flange manufacturers and pipe fitting suppliers the ansi b16. The fileopen plugin works with adobe reader and other. Collation of complete packages combining mill production. Asme pressure classes of flanges forged steel flanges, asme b16. Nov 12, 2017 flange bolting dimensional recommendations.
G mm wn blind sow sw nominal size class 150 flanges to asme b16. For other materials consult the liner dimension tables in this manual. The dimensions in mm reflect the needed precision as much as possible. Hayward pipe distributes industrial and commercial flanges in all the materials listed below. Never use an inflatable plug when its failure could cause injury or catastrophic damage or as the only means of protection for personnel working downstream. This type of flange is available in large sizes also to connect bigbore piping with. The joining method and the quality of fabrication, examination and pressure testing which must comply. Pipe flanges and flanged fittings abangah sanaat baran. 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.
The design of a flange involves the selection of the gasket material, type, and dimensions, flange facing, bolting, hub proportions, flange width, and flange thickness. Except for diameter of bolts and flange bolt holes, combining values from the two systems constitutes. Schedule number or nominal wall thickness designation. Cast iron flanges asme ansi class 250 asme ansi b16. Nominal pipe size outside diameter o thickness t raised face diameter r length thru hub y hub diameter x bore b number of holes diameter of holes bolt circle c approximate weight lbs 12 3. Asme is a notforprofit membership organization that. The pipe flanges are the second most used joining method after welding. These are commonly referred to by their pressure rating class. Dimensions for classes 400, 600 and 900 nps 38 and larger for series a flanges are the same as for the series b flanges. Flange standards the most commonly referred to flange standard in the oil and gas industry is arguably ansi b16. Flange weights, dimensions and working pressures prochem. During dimensional inspection of flange, you should check for.
Asme is a notforprofit membership organization that enables collaboration, knowledge sharing, career enrichment, and. Flange dimensions shall be such that the stresses in the flange, calculated in accordance with 27, do not exceed the allowable stresses specified in 28. Flange dimensions are determined by the pipe size and the pressure class required for the application. Read the standard focus on the foreword which in the 2009 edition is on pages vi thru viii. Flanges are commonly used to connect valves into pipework making it easier for removal and maintenance. Sizes nps 12 through 312 are same as class 600 flanges. Normal fluid service piping specifications appendix a may be used in category. Reducing flanges are available in all types and pressures. Equipment such as pressure vessels can also have socalled body flanges. Ansi and asme are same ansi standards code issues eng. Following approval by the standards committee and asme, this revision to the 1991 edition of.
Technical data handbook for butt weld pipe fittings. In reality, the asme rules, including the flange rotation limits in 214, do not allow enough flange rotation for the gasket to be partially in contact. In pressure classes 150 and 300, the height of raised face is approximately 1. Dimensions weight kg nominal size class 600 flanges to asme b16. This effective width calculation removes any possible correlation between asme flange calculation methods and flange manufacturers provided m and y. The flanges are bolted together with a gasket in between to prevent leackage. Grey cast iron copper alloy cast and forged steel pn 6 120 90 4 m12 14 70 2 16. Nominal pipe size outside diameter o thickness t raised face diameter r length thru hub y point of weld a hub diameter x bore b number of holes diameter of. In order to read a secure pdf, you will need to install the fileopen plugin on your computer.
Coastal flange stocks import and domestic ansi b16. Din flange, en10921 flange, iso9624 flange, uni flange, bs4504 flange, nfe29203 flange, ansi b16. We work with manufacturers in the us and globally to insure the highest quality products and the fastest delivery times. To order a reducing flange, state the smaller size first, then the outside diameter of the larger size. Flange dimensions shall be such that the stresses in the flange, calculated in accordance with 27, do.
These specification include only welding neck and blind flanges. Flange table ansi bs 10 nominal size 25mm 1 in bs 4504 diameter of flange bolt circle number number of bolts diameter of bolts diameter of holes diameter of raised face height of raised face thickness of flange. Flat face flanges may be provided at full thickness, c, or with raised face removed the latter is nonstandard. Grey cast iron copper alloy cast and forged steel pn 6 100 75 4 m10 11 60 2 14 pn 10 115 85 4 m12 14 68 2 16 pn 16 115 85 4 m12 14 68 2 16 8 18 pn 25 115 85 4 m12 14 68 2 18 9 18. This part of iso 7005 establishes a base specification for pipe flanges suitable for general purpose and industrial applications including, but not limited to, chemical process industries, electric power generating industries, petroleum and natural gas industries. Contact us for asme pressure vessel connections forging. October 23, the standard was published as ansi b16. Grooved lightweight flexible coupling series l, style 10. It covers pressuretemperature ratings, dimensions, tolerances, materials, nondestructive examination requirements, testing, and marking for. It places responsibility for the selection of a flange series with the purchaser. These flanges will be furnished with a 116 raised face unless otherwise specified. The term pressure rating is often referred to as class i. Cast copper alloy pipe flanges, flanged fittings, and valves. Flanges manufactured using existing forging dyes and machinery settings based on the inch dimensions should be able to meet the requirements for the metric dimensions.
Weld neck flange dimensions class 150 to class 2500. Nominal size and bore of flange hub and bore dimensions hub length threaded linepipe flange hub length threaded casing flange hub length welding neck linepipe flange neck diameter welding neck linepipe flange tolerance maximum bore of welding neck flange l1 l2 l3 l40. Weld neck flange dimensions are covered in asme b16. Dimensions in inches weld neck flanges and stud bolts asme b16. Forged components meets top industry standards put forth by asme for pressure vessel connections forging and manufacturing. Dimensions in inches of weld neck flanges and stud bolts asme. G mm wn blind rf stud length mm sow sw length thru hub bolt drilling 15 12 88. Standard bore will be furnished unless otherwise specified. It covers pressuretemperature ratings, dimensions, tolerances, materials, nondestructive examination requirements, testing.
Flange comparison table standard dimensions mm nb mm name rating od pcd bolts dia. Nominal pipe size outside diameter o thickness t raised face diameter r length thru hub y point of weld a hub diameter x bore b. Dimensions weight kg dn nps flange od a mm length thru hub bolt drilling flange thickness d mm bore sow sw b mm raised face diam. The design of the flange allows for a full penetration weld at its base where it connects to the pipe. I dont quite understand the confusion regarding flanges with nps greater than 24.
Carbon steel flange, pipe flange, jinan hyupshin flanges co. These flanges may be crafted of cast, plate, or forged materials in ratings classes 75, 150, 300, 400, 600, and 900. All pipe plugs must be blocked or anchored adequately against a force equal to the head pressure times the crosssectional area of the pipe. Piping systems dimensions of pipes and tubes, materials and capacities, pressure drop calculations and charts, insulation and heat loss diagrams. All dimensions are in inches these flanges will be furnished with a 116 raised face unless otherwise specified. Flanges are standardized according publications from organizations like asme, mss, api and others. To order a reducing flange, state the smaller size first, then the.
Flanges are used on equipment for the nozzles and in piping systems. For the height measures h and b of all described dimensions of flanges on this website, with exception of the lap joint flange, it is important to understand and remember the following. There are many common flange standards and flanges within the same standard can etiher be flat commonly cast iron, ductile iron or raised face commonly cast steel and stainless steel. Learn different types of pipe flanges used in piping.
Ansi american national standards institute ansi provides a forum for development of american national standards. Weld neck flange datasheets the weld neck flange, abbreviated as wnf, is a flange type that is usually used with pipes, as opposed to pressure vessels. The length of the stud bolt does not include the height of the chamfers points. Thickness and length through hub do not include 14 raised face. In 1996, metric dimensions were added as an independent but equal standard to the inch units. Download the complete crp lined pipe and fittings brochure pdf.
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