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. The design of the flange allows for a full penetration weld at its base where it connects to the pipe. Weld neck flange dimensions are covered in asme b16. These specification include only welding neck and blind flanges. Flange standards the most commonly referred to flange standard in the oil and gas industry is arguably ansi b16. G mm wn blind rf stud length mm sow sw length thru hub bolt drilling 15 12 88. Flange weights, dimensions and working pressures prochem. Flanges are standardized according publications from organizations like asme, mss, api and others.
Flanges are commonly used to connect valves into pipework making it easier for removal and maintenance. I dont quite understand the confusion regarding flanges with nps greater than 24. It covers pressuretemperature ratings, dimensions, tolerances, materials, nondestructive examination requirements, testing, and marking for. Contact us for asme pressure vessel connections forging.
Read the standard focus on the foreword which in the 2009 edition is on pages vi thru viii. Forged components meets top industry standards put forth by asme for pressure vessel connections forging and manufacturing. Cast iron flanges asme ansi class 250 asme ansi b16. Coastal flange stocks import and domestic ansi b16. Ansi and asme are same ansi standards code issues eng. Normal fluid service piping specifications appendix a may be used in category. 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. Sizes nps 12 through 312 are same as class 600 flanges. Equipment such as pressure vessels can also have socalled body flanges. The flanges are bolted together with a gasket in between to prevent leackage. Flange comparison table standard dimensions mm nb mm name rating od pcd bolts dia.
Dimensions weight kg nominal size class 600 flanges to asme b16. Piping systems dimensions of pipes and tubes, materials and capacities, pressure drop calculations and charts, insulation and heat loss diagrams. Collation of complete packages combining mill production. Dimensions in inches of weld neck flanges and stud bolts asme. Asme is a notforprofit membership organization that. Nov 12, 2017 flange bolting dimensional recommendations. These flanges may be crafted of cast, plate, or forged materials in ratings classes 75, 150, 300, 400, 600, and 900.
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. Dimensions in inches weld neck flanges and stud bolts asme b16. The fileopen plugin works with adobe reader and other. Pipe flanges and flanged fittings abangah sanaat baran. Asme pressure classes of flanges forged steel flanges, asme b16. The pipe flanges are the second most used joining method after welding. 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. Asme is a notforprofit membership organization that enables collaboration, knowledge sharing, career enrichment, and. 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. Weld neck flange dimensions class 150 to class 2500. 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. Thickness and length through hub do not include 14 raised face.
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. 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. 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. Carbon steel flange, pipe flange, jinan hyupshin flanges co. It places responsibility for the selection of a flange series with the purchaser.
Hayward pipe distributes industrial and commercial flanges in all the materials listed below. It covers pressuretemperature ratings, dimensions, tolerances, materials, nondestructive examination requirements, testing. We work with manufacturers in the us and globally to insure the highest quality products and the fastest delivery times. Flanges are used on equipment for the nozzles and in piping systems. The dimensions of flanges in piping systems and also the smaller flanges on equipment are standardized. Grey cast iron copper alloy cast and forged steel pn 6 120 90 4 m12 14 70 2 16. Following approval by the standards committee and asme, this revision to the 1991 edition of. These are commonly referred to by their pressure rating class. All pipe plugs must be blocked or anchored adequately against a force equal to the head pressure times the crosssectional area of the pipe. Reducing flanges are available in all types and pressures. Ansi american national standards institute ansi provides a forum for development of american national standards. Learn different types of pipe flanges used in piping. 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. This type of flange is available in large sizes also to connect bigbore piping with.
In order to read a secure pdf, you will need to install the fileopen plugin on your computer. 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. In pressure classes 150 and 300, the height of raised face is approximately 1. Download the complete crp lined pipe and fittings brochure pdf. G mm wn blind sow sw nominal size class 150 flanges to asme b16. During dimensional inspection of flange, you should check for. Except for diameter of bolts and flange bolt holes, combining values from the two systems constitutes. Grooved lightweight flexible coupling series l, style 10. The dimensions in mm reflect the needed precision as much as possible. Bolted flange design according to asme section viii division 1. Cast copper alloy pipe flanges, flanged fittings, and valves. Debris or protrusions in the pipeline can damage a seal or rupture inflatable plugs. These flanges will be furnished with a 116 raised face unless otherwise specified.
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 dimensions shall be such that the stresses in the flange, calculated in accordance with 27, do. However, despite being referred to extensively by engineers, flange manufacturers and pipe fitting suppliers the ansi b16. In 1996, metric dimensions were added as an independent but equal standard to the inch units. 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. The length of the stud bolt does not include the height of the chamfers points. For other materials consult the liner dimension tables in this manual. Standard bore will be furnished unless otherwise specified.
Flange dimensions are determined by the pipe size and the pressure class required for the application. All dimensions are in inches these flanges will be furnished with a 116 raised face unless otherwise specified. Schedule number or nominal wall thickness designation. 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. Technical data handbook for butt weld pipe fittings. 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. Forged or rolled alloy steel pipe flanges, forged fittings, and valves and parts. To order a reducing flange, state the smaller size first, then the. Flat face flanges may be provided at full thickness, c, or with raised face removed the latter is nonstandard. The joining method and the quality of fabrication, examination and pressure testing which must comply. The term pressure rating is often referred to as class i. 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 not exceed the allowable stresses specified in 28.
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