Flanges

Threaded Flanges are also known as screwed flange, and it is having a thread inside the flange bore which fits on the pipe with matching male thread on the pipe. This type of joint connection is Speedy and simple but not suitable for high presser and temperature applications. Threaded Flanges are mostly used in utility services such as air and water.

A flanged joint is composed of three components; flanges, gaskets, and bolting; which are assembled by pipe fitter. Special controls are required in the selection and application of all these elements to attain a joint, which has acceptable leak tightness.

However, it is not advisable to use a flange connection in underground piping when it supposed to be buried. The flange is also the most common source of leak and fire in a process plant. There are a variety of flanges available to suit the requirements. 

The pipe flanges are the second most used joining method after welding. They are used when joints need dismantling. It provides flexibility for maintenance. Flange connects the pipe with various equipment and valves. Breakup flanges are added in the pipeline system if regular maintenance is required during plant operation.
A flanged joint is composed of three components; flanges, gaskets, and bolting; which are assembled by pipe fitter. Special controls are required in the selection and application of all these elements to attain a joint, which has acceptable leak tightness.

Standard ANSI: ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48 ,JIS,DIN,BS4504,SABS1123,EN1092-1, UNI,AS2129,GOST-12820

DIN: DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673

B.S: BS4504 , BS4504, BS1560, BS10

Pressure Class 150, Class 300, Class 400, Class 600, Class 900, Class 500, Class 2500 | PN 6, PN 10, PN 16, PN 25, PN40, PN 64 etc.

Size: 15 NB to 750 NB, 1/2-78 inch (DN15-DN2000)

Connection Type: Raised Face, Flat Face, Ring Type Joint, Lap-Joint Face, Large Male-Female, Small Male-Female, Large Tongue & Groove, Small Tongue & Groove.

Carbon Steel: A-350 LF2 LF3, A105

TESTING FACILITIES:
Chemical Analysis
Mechanical Test
Metallography Test
Hydrostatic
Corrosion Test
Ultrasonic Test
Radiography
Miscellaneous Test

CERTIFICATES & APPROVALS:
EIL
IBR

Additional Information
Delivery Time: Ready stock
Packaging Details: Wooden Box

The blind flange is a blank disc with a bolt hole. These types of flanges are used with another type of flange to isolate the piping system or to terminate the piping as an end. Blind flanges are also used as a manhole cover in the vessel.
The purpose of these is to block off a section of pipe or a nozzle on a vessel that is not used. A nozzle is typically a pipe coming out of a vessel and is usually flanged so it can be connected to valves or piping. Many times a nozzle will be blanked off with a blind flange for pressure tests in a plant, or simply because the customer does not need all the nozzles that were supplied on the tank.

Blind flanges, just like standard pipe flanges, can be raised face RF or flat faced FF. If the flange is RF we would recommend a standard ring gasket that is appropriate for the service and/or test. If it is FF we would TYPICALLY use a full face gasket, because the most common reason the flange is FF is that it is not designed to handle the bending forces that result when using a ring gasket or a RF flange against the FF flange
 

Weld neck flange is the most widely used type in process piping.
It gives the highest level of joint integrity due to Butt-welded with a pipe.
These types of flanges are used in high pressure and temperature application. Weld neck flanges are Bulky & costly with respect to other types of the flange.

Welding Neck Flanges are easy to recognize at the long tapered hub that goes gradually over to the wall thickness from a pipe or fitting.

The long tapered hub provides an important reinforcement for use in several applications involving high pressure, sub-zero and / or elevated temperatures. The smooth transition from flange thickness to pipe or fitting wall thickness effected by the taper is extremely beneficial, under conditions of repeated bending, caused by line expansion or other variable forces.

These flanges are bored to match the inside diameter of the mating pipe or fitting so there will be no restriction of product flow. This prevents turbulence at the joint and reduces erosion. They also provide excellent stress distribution through the tapered hub and are easily radiographed for flaw detection.

This flange type will be welded to a pipe or fitting with a single full penetration, V weld (Buttweld).

The pipe flanges are the second most used joining method after welding. They are used when joints need dismantling. It provides flexibility for maintenance. Flange connects the pipe with various equipment and valves. Breakup flanges are added in the pipeline system if regular maintenance is required during plant operation.

A flanged joint is composed of three components; flanges, gaskets, and bolting; which are assembled by pipe fitter. Special controls are required in the selection and application of all these elements to attain a joint, which has acceptable leak tightness.

However, it is not advisable to use a flange connection in underground piping when it supposed to be buried. The flange is also the most common source of leak and fire in a process plant. There are a variety of flanges available to suit the requirements.

Materials used:
Alloy steel
Carbon steel
Stainless steel
Cast iron
Rubber
PVC
Thermoplastics
Aluminum
Brass
Bronze etc.

Stainless Steel : ASTM A 182, A 240

Grade : 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

Carbon Steel : ASTM A 105, ASTM A 181

Alloy Steel : ASTM A 182, GR F1, F11, F22, F5, F9, F91

Nickel Alloys : Monel 400 & Monel 500, Inconel 600 & Inconel 625, Incolloy 800, Incolloy 825, Hastelloy C22, Hastelloy C276

Copper Alloys : Copper, Brass & Gunmetal


Socket Weld Flanges available in:-

Stainless Steel Socket Weld Flange
Alloy Steel Socket Weld Flange
Carbon Steel Socket Weld Flange
Nickel Alloy Socket Weld Flange
Copper Alloy Socket Weld Flange

The pipe flanges are the second most used joining method after welding. They are used when joints need dismantling. It provides flexibility for maintenance. Flange connects the pipe with various equipment and valves. Breakup flanges are added in the pipeline system if regular maintenance is required during plant operation.
A flanged joint is composed of three components; flanges, gaskets, and bolting; which are assembled by pipe fitter. Special controls are required in the selection and application of all these elements to attain a joint, which has acceptable leak tightness.

Standard ANSI: ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48 ,JIS,DIN,BS4504,SABS1123,EN1092-1, UNI,AS2129,GOST-12820

DIN: DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673

B.S: BS4504 , BS4504, BS1560, BS10

Pressure Class 150, Class 300, Class 400, Class 600, Class 900, Class 500, Class 2500 | PN 6, PN 10, PN 16, PN 25, PN40, PN 64 etc.

Size: 15 NB to 750 NB, 1/2-78 inch (DN15-DN2000)

Connection Type: Raised Face, Flat Face, Ring Type Joint, Lap-Joint Face, Large Male-Female, Small Male-Female, Large Tongue & Groove, Small Tongue & Groove.

Stainless Steel Flanges: ASTM A182 F202, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 316LN, 310S, 317L, 321, 410, 420, 440C, 202. F904L

TESTING FACILITIES:

Chemical Analysis
Mechanical Test
Metallography Test
Hydrostatic
Corrosion Test
Ultrasonic Test
Radiography
Miscellaneous Test

CERTIFICATES & APPROVALS:
EIL
IBR

Additional Information
Delivery Time: Ready stock
Packaging Details: Wooden Box

The most common material grade used is A105 forged carbon steel, with sizes ranging from 1/2“ – 24” in ASME B16.5, 26” – 60” in ASME B16.47, and 26” – 96” in B16.1 (for temperatures ranging from ambient up to 1,000 Fahrenheit and pressure between 20 – 6,170 psi).

Modern carbon is a common steel with carbon content up to 2.1% by weight and primarily alloyed with iron. The term “carbon steel” may also be used to call out steel which does not have a large amount of chromium or nickel. The carbon content can vary for A105 with a maximum allowable of 0.35 as a percentage composition. As the carbon content increases, the steel hardens and increases in strength through heat treatment processes 

ASTM A105, ASTM A182, ASTM A694, ASTM A516, and ASTM A350 are available

These flanges are available in many types like socket weld flanges, blind flanges, weld neck flanges, and slip-on flanges, etc

Reducing flange is used in place of a standard flange to allow for a change in pipe size. This flange eliminates the need for a standard reducer in piping.  The flange consists of one specified diameter with a smaller diameter bore size. Except for the bore and hub dimensions, a reducing flange has dimensions of the standard pipe flanges size and is considered an economical means to make a pipe size transition.

These flanges available in weld neck, slip-on, and threaded end types. Reducing flanges are an economical way to make transitions between pipes of different sizes, however, due to high-pressure loss; they are rarely used in piping. ASME B16.5 covers the dimensions of the reducing flanges.

The pipe flanges are the second most used joining method after welding. They are used when joints need dismantling. It provides flexibility for maintenance. Flange connects the pipe with various equipment and valves. Breakup flanges are added in the pipeline system if regular maintenance is required during plant operation.
A flanged joint is composed of three components; flanges, gaskets, and bolting; which are assembled by pipe fitter. Special controls are required in the selection and application of all these elements to attain a joint, which has acceptable leak tightness.

Standard ANSI: ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48 ,JIS,DIN,BS4504,SABS1123,EN1092-1, UNI,AS2129,GOST-12820

DIN: DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673

B.S: BS4504 , BS4504, BS1560, BS10

Pressure Class 150, Class 300, Class 400, Class 600, Class 900, Class 500, Class 2500 | PN 6, PN 10, PN 16, PN 25, PN40, PN 64 etc.

Size: 15 NB to 750 NB, 1/2-78 inch (DN15-DN2000)

Connection Type: Raised Face, Flat Face, Ring Type Joint, Lap-Joint Face, Large Male-Female, Small Male-Female, Large Tongue & Groove, Small Tongue & Groove.

Carbon Steel: A-350 LF2 LF3, A105

TESTING FACILITIES:
Chemical Analysis
Mechanical Test
Metallography Test
Hydrostatic
Corrosion Test
Ultrasonic Test
Radiography
Miscellaneous Test

CERTIFICATES & APPROVALS:
EIL
IBR

Additional Information
Delivery Time: Ready stock
Packaging Details: Wooden Box

A flange can also be a plate or ring to form a rim at the end of a pipe when fastened to the pipe (for example, a closet flange). A blind flange is a plate for covering or closing the end of a pipe. A flange joint is a connection of pipes, where the connecting pieces have flanges by which the parts are bolted together.

150 lb. Slip-On Plate Flanges

 OD AND DRILLING for  through 24 pipe sizes per ASME/ANSI B16.5-1996 Class 150

 OD AND DRILLING for 30& 36 pipe size per ASME/ANSI B16.1-1989 Class 125

The ANSI B16.5 Class 150 Plate Flanges are meant for both Pipe systems as well as Flanged Fittings. The specification for the ASME B16.5 Plate Flanges covers, dimensions, tolerances, marking, testing, pressure &temperature ratings, materials including methods of designating openings for flanges and flanged fittings in pipe systems. The following points are included:

Plate Flange with pressure rating class designations i.e. class 150, class 300, class 400, class 600, class 900, and class 1500 in a size range between NPS 1/2 up to NPS 24 & Alloy Steel Plate Flanges with pressure rating class designation class 2500 is available in sizes NPS 1/2 till NPS 12.

The requirements of the ASME B16.5 Plate Flange has been given in both metric as well as the U.S. Customary units with diameter of bolts and Plate Flange Dimensions bolt holes expressed in inch units;

Flanged fittings with rating class designation class 400, class 600, class 900, and class 1500 in sizes NPS 1/2 through NPS 24 and ANSI B16.5 Plate Flanges fittings with rating class designation with Stainless Steel Plate Flanges class 2500 in sizes NPS 1/2 up until NPS 12. These have been acknowledged in the specification in Non-Mandatory Appendix E section of the Flat Faced Plate Flanges in which only U.S. Customary units are provided.

ASME B16.5 Plate Flange has been limited to flanges and flanged fittings made from materials such as cast or forged materials. While blind flanges and certain reducing flanges could be manufactured from other metals such as cast, forged, or plate materials are exported by plate flange manufacturers. Also included in this Standard are requirements and recommendations regarding the ASME B16.5 Plate Flange for bolting, flange gaskets, as well as flange joints.

This Standard is to be used by ASME B16.5 Plate Flange manufacturers in conjunction with equipments that have been mentioned in other volumes of the Standards in ASME B16 Series as well as with other ASME standards. Therefore, the ASTM A182 SS Plate Flange could be used for both the Boiler and Pressure Vessel Code as well as the B31 Piping Codes.

PN is an acronym for Pressure Nominale. The PN is used as a prefix to the pressure rating of the Flanges. ... Following international flange standards such as ISO 7005-1 or DIN 2501, PN10, PN16, PN25, and PN40 specify both pressure class in pressure bars and metric flange dimensions that use the metric measuring system
EN 1092-1 is for steel flanges, EN 1092-2 is for iron flanges, EN 1092-3 is for alloy flanges, EN 1092-4 is for aluminum alloy flanges. PN stands for Nominal Pressure and roughly equates to the number of bars i.e. the cold working pressure of PN10 is 10 bar. Ratings range from PN2. 5 to PN420
The Term PN is a Flange standard, they specify the pressure class in bar and metric standard following the metric dimensions. In general Flanges are used for connections with Equipments or Inter connections between the Metallic and Non metallic