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.
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
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.
The most common facings machined on flanges are:
FLANGES TYPES & APPLICATIONS
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
ANSI AND MSS SPECIFICATIONS
The standards govern the dimensions and tolerances to which fitting are manufactured:
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
|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|
|PRESSURE CLASS||PN 2.5 TO PN6, PN10, PN16, PN25, PN40|
|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|
|PRESSURE CLASS||PN6, PN10, PN16, PN25, PN40 TO PN 100|