Useful flanges Information - Types of Flanges - Type of Flange Materials - Standard Type - Dimension Type Flange

Useful flanges Information, Types of Flanges, Type of Flanges, Type of Flange, Flanges Types, Flange Type, All Types of Flanges, types of flanges with pictures, flange face types

Available all types of flanges, types of blind flanges, flange types and names, different types of flanges, different types of pipe flanges manufacturer in india, Flanges at best price with high quality

ASME B16.5 Flanges

ASME B16.47 Flanges

ASME B16.5 Class 150 Flanges

Types of Flanges


Kamlesh Metal (India) is a dynamic group, which was established over a decade ago to cater to growing demands of Flanges like Weld Neck Flanges, Slip On Flanges, Threaded Flanges ,Socket Weld Flanges, Blind Flanges etc in all materials like Stainless Steel , Carbon Steel & High Nickel Alloys. We Manufacture, Export and Supply flanges which meets with national and international quality standards.

General Information:

Quality Standard for Flanges

High quality Flanges all made and controlled to the relevant standards such as: ASME, ASTM, BS and DIN/WERKSTOFFE.

Sizes for Flanges

All valves are available available in sizes from 1/4” through to any size.

Wall Thickness for Flanges

Schedule 5s through to Schedule XXS and heavier.

Dimensions and Pressure Ratings for Flanges:

- ANSI, MSS- SP-44, BS3293, API 605 150lb through to 2500lb
- Flange Facings: Raised Face, Ring Type Joint, Large Tongue & Groove, Small Tongue & Groove
- BS4504 - PN6, 10, 16, 25, 64
- BS10 - Table D, E, F, & H
- DIN Standards

Types of Standard


A pipe flange is a disc, collar or ring that attaches to pipe with the purpose of providing increased support for strength, blocking off a pipeline or implementing the attachment of more items. Pipe flanges are usually welded or screwed to the pipe end and are connected with bolts. A gasket is inserted between the two mating flanges to provide a tighter seal. Pipe flanges are either custom with dimensions provided by the customer or they are manufactured according to published specifications. Several organizations and associations have published specifications that provide dimensional information as well as pressure specifications at different temperatures. Kamlesh Metal Supplies and stock 6 basic types of pipe flanges.

What are Flanges & Types of Flanges

  • A flange is a forged or cast ring of steel designed to connect sections of pipe or join pipe to a pressure Vessel, pump or any other integral flanges assembly.
  • Flanges are joined to each other by bolting and joined to the piping system by welding or threading.
  • The basic types of flanges are; Slip on, Blind, Weld Neck, Threaded, Socket Weld, Lap Joint and Orifice.
  • Flanges are designed to the following pressure ratings; 150lb, 300lb, 400lb, 600lb, 900lb, 1500lb and 2500lb.

The most common facings machined on flanges are:

  • (a) Raised face, 1/16 inch for 150lb and 300lb, ¼ inch for 400lb and heavier.
  • (b) Flat face, for 150lb and 300lb only, other may be flat face on request.
  • (c) Ring type joint, may be applied to all pressure ratings.


Slip-On Flange

The flange is slipped over the pipe and then welded both inside and outside to provide sufficient Strength and prevent leakage. This flange is used in preference to weld necks by many users because of its lower cost and the fact that less accuracy is required when cutting pipe to length.

Blind Flanges

This is a flange without a bore and is used to shut off a piping system or vessel opening. It also permits Easy access to vessels or piping systems for inspection purposes. Blind flange can be supplied with or without hubs at the manufacturers option.

Weld-Neck flange

This is designed to be joined to a piping system by buttwelding. It is relatively expensive because of Its long neck, but is preferred for high stress applications. The neck, or hub transmits stresses to the the base of the hub to the wall thickness at the butt weld, provide important reinforcement of the flange. The bore of the flange matches the bore of the pipe, reducing turbulence and erosion.

Threaded Flange

This is similar to a slip-on flange in outline, but the bore is threaded, thus enabling assembly without welding. This obviously limits its application to relatively low pressure piping systems. The flange may be welded around the joint after assembly, but this is not considered a satisfactory method of increasing its applications.

Socket Weld Flanges

This is similar to a slip-on flange in outline, but the bore is counter-bored to accept pipe. The diameter of the remaining bore is the same as the inside diameter of the pipe. The flange is attached to the pipe by a fillet weld around the hub of the flange. An optional interval weld may be applied in high stress applications. It’s biggest use is in high pressure systems such as hydraulic and steam lines.

Spectacle Flanges

This is a pressure retaining plate with one solid end and one open end connected with a web or tie-bar. In normal operation, the open end forms the seal between two flanges and permits normal flow of fluid through pipe work. If the solid end is swung into position it effectively blanks of the pipe and halts the flow.

Lap-Joint Flanges

This is again similar to a slip-on flange, but it has a radius at the intersection of the bore and the flange face to accommodate a lap stub end. The face on the stub end forms the gasket face on the flange. This type of flange is used in applications where section of piping systems need to be dismantle quickly and easily for inspection or replacement.

Orifice Flanges

The function of an orifice flange is to provide access to a line for metering of gases or liquids. An orifice plate is clamped between a pair of flanges when installed in a line and the whole assembly is refer to as an orifice flange union. Jack-screws within the assembly facilitate removal of the orifice plate. The orifice plate, the metering device, consists of a thin plate with a concentric, square edge, circular hole in the centre. Two pressure tap-holes are drilled in each flange to measure pressure difference through the orifice.

Groove & Tongue Flanges

The Groove and Tongue faces of these flanges must be matched. One flange face has a raised ring (Tongue) machined onto the flange face while the mating flange has a matching depression (Groove) machined into it's face. Tongue-and-groove facings are standardized in both large and small types. They differ from male-and-female in that the inside diameters of the tongue-and-groove do not extend into the flange base, thus retaining the gasket on its inner and outer diameter. These are commonly found on pump covers and Valve Bonnets. Tongue-and-groove joints also have an advantage in that they are self-aligning and act as a reservoir for the adhesive. The scarf joint keeps the axis of loading in line with the joint and does not require a major machining operation. General flange faces such as the RTJ, T&G and the F&M shall never be bolted together. The reason for this is that the contact surfaces do not match and there is no gasket that has one type on one side and another type on the other side.

Long Neck Flanges

Owing to our rich industrial experience, we are offering a comprehensive range of Long Weld Neck Flanges. The professionals of our organization source these neck flanges from trusted vendors. These flanges are unique due to their simple connectivity with other pipes. Moreover, our products are extensively used in refining industries for linking purposes. Our esteemed patrons can avail these qualitative range of flanges from us at industry-leading prices.

Flat Face Flanges

The Flat Face (FF) flange has a gasket surface in the same plane as the bolting circle face. Applications using flat face flanges are frequently those in which the mating flange or flanged fitting is made from a casting. Flat face flanges are never to be bolted to a raised face flange. ASME B31.1 says that when connecting flat face cast iron flanges to carbon steel flanges, the raised face on the carbon steel flange must be removed, and that a full face gasket is required. This is to keep the thin, bittle cast iron flange from being sprung into the gap caused by the raised face of the carbon steel flange.

Raised Face Flanges

The Raised Face (RF) type is the most applied flange face, and is easily to identify. It is referred to as a raised face because the gasket surfaces are raised above the bolting circle face.

Specifications covering the manufacture and dimensions of flanges:


ASTM specifications regulate approved raw materials for which flanges can be made and specifications .

For stainless flanges are:

ASTM A.182 - Forged or Rolled Alloy Steel Pipe Flanges & Fittings for high temperature service.


The standards govern the dimensions and tolerances to which fitting are manufactured:

  • ANSI B. 16.5 - Steel Pipe Flanges and Flanged Fittings (½ inch to 24 inch nominal diameter)
  • MSS SP.6 - Flange Facings
  • MSS SP.25 - Marking of flanges
  • MSS SP.39 - Bolts and Nuts for Flanges
  • MSS SP.44 - Large Diameter Pipeline Flanges. (Over 24 inch dia)
  • API-605 - Large Diameter Flanges for petroleum Usage. (Over 24 inch dia)

The ASME Code is not a standard as such but section VIII provides the procedure for calculating dimensions

For all pressurised vessels flanges.

The following are not flange specifications but they influence the manufacture of forged steel flange

  • ANSI B. 31.10 - Code for Pressure Piping
  • ANSI B. 31.3 - Petroleum Refinery Piping
  • ANSI B. 31.4 - Oil Transportation Piping
  • ANSI B. 31.5 - Refrigeration Piping Systems
  • ANSI B. 31.7 - Nuclear Power Piping
  • ANSI B. 31.8 - Gas Transmission and Distribution Piping systems
  • ANSI B. 36.10 - Standard for Wrought Steel pipe
  • ANSI B. 36.19 - Standard for Stainless Steel Pipe
  • ANSI B. 16.10 - Valve Dimensions Face & End
  • ANSI B. 16.11 - Forged Fittings Socket Weld & Threaded

Material Grades for Flanges : Types of Flanges are available in the following material grades:

Material & Grades of Flange :
  • Stainless Steel Flange : ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L Flange
  • Duplex & Super Duplex Steel Flange : ASTM A182 / ASME SA182 F44, F 45, F51, F 53, F 55, F 60, F 61 Flange
  • Carbon Steel Flange : ASTM A105 / ASME SA105 ASTM / ASME A 350 , ASTM A181 LF2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706 Flange
  • Low Temperature Carbon Steel Flange: ASTM A350, LF2, LF3 Flange
  • Alloy Steel Flange : ASTM A182 / ASME SA182 & A387 F1, F5, F9, F11, F12, F22, F91 Flange
  • Copper Alloy Steel Flange : ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200
  • Nickel Alloy Flange : ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020) Flange

Specifications of Flanges

ASME/ANSI B 16.5 Welding Neck Flange, Slip on Flange, Blind Flange, High Hub Blind Flange, Socket Weld Flange, Lap Joint Flange, Threaded Flange, Ring Type Joint Flange
PRESSURE CLASS 150 LB, 300 LB, 400 LB, 600 LB, 900 LB, 1500 LB, 2500 LB
ASME/ANSI B 16.47 Welding Neck Flange, Blind Flange [Series A & B]
PRESSURE CLASS 75 LBS, 150 LBS, 300 LBS, 400 LBS, 600 LBS, 900 LBS
ASME/ANSI B 16.36 Welding Neck Flange, Slip on Flange, Threaded Flange
PRESSURE CLASS 300 LBS, 400 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
BS 4504 SEC 3.1 Welding Neck Flange, Hubbed Slip on Flange, Hubbed Threaded Flange, Lapped Pipe End Flange, Plate Flange, Loose Plate Flange, Loose Plate With Weld Neck Flange, Blank Flange
BS 4504 [PART 1] Welding Neck Flange, Hubbed Slip-On Hubbed Threaded, Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange
PRESSURE CLASS PN 2.5 PN6, PN10, PN16, PN25, PN40 TO PN 400
BS 1560 BOSS Welding Neck Flange, Socket Welding Flange, Slip-On Flange, Blind Flange, Screwed Boss Flange, Lapped Flange
PRESSURE CLASS 150 LB, 300 LB, 400 LB, 600 LB, 900 LB, 1500 LB, 2500 LB
BS10 Welding Neck Flange, Plate Slip-On Flange, Screwed Boss Flange, Slip-On Boss Flange, Blind Flange
TABLE Table D, Table E, Table F, Table H
DIN FLANGES DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673

We have exported Pipe flanges to over 60 countries including UAE United Arab Emirates, UK, Iran, Iraq, Qatar, Bahrain, Oman, Yemen, Lebanon, Jordan, Saudi Arabia, Malaysia, Indonesia, Singapore, Australia, New Zealand, USA, Canada, Mexico, Brazil, Netherlands, Germany, Italy, Spain, Serbia, Kuwait, Peru, Nigeria, Poland, South Africa, Denmark, Turkey, Egypt, Venezuela, Madagascar, Angola , Sri Lanka, United States, South Korea, South Africa, Abu Dhabi, Calgary, Doha, Houston, Dubai, Perth, Brisbane, Dallas, Seoul & we are a major Pipe Flange Exporters & Suppliers in Below Countries.

Useful flanges Information, Types of Flanges, Type of Flanges, Type of Flange, Flanges Types, Flange Type, All Types of Flanges, types of flanges with pictures, flange face types

Available all types of flanges, types of blind flanges, flange types and names, different types of flanges, different types of pipe flanges manufacturer in india, Flanges at best price with high quality
Type of ASME B16.5 Flange, Type of ASME B16.47 Flange, Type of ASME B16.48 Flange, Type of ASME B16.36 Flange, Type of DIN Flange, Type of JIS Flange, Type of BS 4504 Flange, Type of BS 10 Flange, Type of EN1902-1 Flange, Type of Class 150 Flange, Type of Class 300 Flange, Type of Class 600 Flange

FRP Flanges