- Specifications:
- Materials: Most standards specify the material from which the flange is produced. The buyer should specify the exact requirements.
- Flange Sizes: All grades and sizes compatible to standard pipe ranges and wall thicknesses (pressure ratings) are available.
- Flange Face: We offer flanges in various face configurations like flat face, raised face, tongue and groove, ring joint.
- Face Finish: The finish on the flange face is determined as an Arithmetical Average Roughness Height (AARH). The finish is determined by the standard used. For example, ANSI B16.5 specifies face finishes within a range 125AARH - 500AARH (3.2 Ra to 12.5 Ra). Other finishes are available on request, for example 1.6 Ra max, 3.2/6.3 Ra, 1.6/3.2 Ra or 6.3/12.5 Ra. The range 3.2/6.3 Ra is most popular.
Weldneck Flange
This flange is circumferentially welded into the system at its neck. This implies that the integrity of the butt welded area can be easily studied by radiography. The bores of both pipe and flange match. This helps in reducing turbulence and erosion inside the pipeline. The weld neck flanges are therefore favoured in critical applications
Grades:
F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L
Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750
Types of Weldneck Flange:
Class 150,Class 300, Class 400, Class 600, Class 900, Class 1500, Class 2500
Slip on Flange 
The slip on flange is slipped over the pipe and then fillet welded. These flanges are suitable to be used in fabricated applications.
Grades:
F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L
Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750
Types of Slip on Flanges:
Class 150,
Class 300,
Class 400,
Class 600,
Class 900,
Class 1500
Blind Flange: 
Blind flanges are used to blank off pipelines, valves and pumps. Blind flanges can also be used as an inspection cover. Also referred to as a blanking flange.
Grades :
F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L
Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750
Types of Blind Flanges:
Class 150,
Class 300,
Class 400,
Class 600,
Class 900,
Class 1500
Socket Weld Flange 
Socket weld flange is counter bored to accept the pipe before being fillet welded. The bore of the pipe and flange are both the same therefore giving good flow characteristics.
Grades:
F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L
Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750
Types of Blind Flanges:
Class 150 and 300, Class 600 and 1500
Lap Joint Flange:
Lap joint flanges are always used with either a stub end or taft which is butt welded to the pipe with the flange loose behind it. This implies that the stub end or taft always makes the face. The lap joint is preferred in low pressure applications because it is easily assembled and aligned. To reduce cost, threaded flanges can also be supplied without a hub and/or in treated, coated carbon steel.
Grades :
F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L
Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750
Types of Blind Flanges:
Class 150,
Class 300,
Class 400,
Class 600,
Class 900,
Class 1500,
Class 2500
Socket Weld Flange Grades:
F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L
Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750
Types of Blind Flanges:
Class 150 and 300, Class 600 and 1500
Threaded Flange: 
The threaded flange is also referred to as either threaded or screwed. It is used to connect other threaded components in low pressure, non-critical applications. No welding is required in socket weld flange.
Grades :
F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L
Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750
Types of Blind Flanges:
Class 150,
Class 300,
Class 400,
Class 600,
Class 900,
Class 1500,
Class 2500
Ring Type Joint Flange:
Ring type joint flange is a type of leak proof flange connection at high pressures. A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal. This jointing method can be employed on Slip-on, Weld Neck, and Blind Flanges.
Grades :
F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L
Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750
Types of Blind Flanges:
ASME B 16.47 Series A (MSS SP 44) Flanges
Class 150,
Class 300,
Class 400,
Class 600,
Class 900
ASME B 16.47 Series B (API 605) Flanges
Class 75, Class 150, Class 300, Class 400, 600,900
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