Opening Flanges manufacturers in India

Carbon Steel Opening Flanges manufacturer India

Buy Stainless Steel Opening Flanges and Alloy Steel Opening Flanges at lowest price in Mumbai, India


Red Earth Steels Pvt Ltd is reckoned amongst the prominent in Opening Flanges Manufacturer. ASME B16.36 flanges are orifice flanges and they are used for measuring the flow of fluid that has been transported through a pipeline, via a flow nozzle, that has been kept on the flange. Opening flanges of ASME B16.36 can be obtained from Class #300 - Class #2500. Opening Class #300 flanges are procurable in types such as weld neck end, slip-on and threaded. Opening Class #600 and flanges above that Class, can be obtained in only weld neck type end. Opening flanges of ASME B16.36 are produced in various grades and sizes. Opening flanges of ASME B16.36 are obtainable in a variety of standard materials and special materials such as A182 F316 Stainless Steel, A182 F22 2¼% Cr 1% Mo, A105 Carbon Steel, A182 F304 Stainless Steel, A350 LF2 Low Temp Carbon Steel and A182 F11 1% Cr ½% Mo.


 Opening Flanges


Carbon Steel Opening Flanges manufacturer India

Carbon Steel Opening Flanges
Stainless Steel  Opening Flanges manufacturer India

Stainless Steel Opening Flanges
Alloy Steel  Opening Flanges manufacturer India

Alloy Steel Opening Flanges

When the inspection of ASME B16.36 Opening flanges is being carried out, it is crucial to check for the length of the hub, bolt circle and bolt hole diameter, straightness and alignment of the bolt hole, thickness of weld end, outer and inner diameter of body and tap holes dimensions. Opening flanges of ASME B16.36 are available in weld neck, threaded and socket weld, they are obtainable in different dimensions and they are also available in all ASTM forged grades (182, A350, A105 and A694). An Opening flange union is 2 orifice flanges joined together. Opening flanges are basically the same as slip on flanges or weld neck flanges, the differences being that stainless steel Opening flanges of ASME B16.36 have extra machining and another difference is that in the flange ring, orifice flanges have radial, tapped holes. This serves as the purpose of meter connections and so that additional bolts can serve as jack screws to allow for the separation of flanges, at the time of replacement or inspection of the orifice plate.

ANSI/ASME B16.36 Opening flanges are used together with orifice meters and in this way it becomes possible to measure the flow rates of gas, oil and other liquids that have been transported in a pipeline. The conventional assembly of Opening flanges includes nuts, Opening plate, bolts, plugs, gaskets, a couple of flanges and jacking screws. Because of the jacking screws, easy removal of the primary flow element is accomplished. When there is a need for the installation of a flow nozzle or an orifice plate, instead of using standard pipe flanges, Opening flanges of ASME B16.36 are used. Generally, Opening flanges are available in RTJ (Ring Type Joint) facings or as Raised Faces. The most used Opening flanges of ASME B16.36 are weld neck flanges and the most popularly used among these are Threaded Class 300, Slip On Class 300 and Welding Neck Classes 900, 300, 2500, 600, 400 and 1500. Opening flanges of ASME B16.36 can be constructed from a variety of materials such as carbon steel, alloy, stainless steel and any other suitable material.


Get suitable Opening Flanges manufacturers in UAE, India, Qatar, Singapore, Dubai, UK, Australia and South Africa.

Save up to 40% on Carbon Steel Opening Flanges. Visit Stainless Steel Opening Flanges manufacturers factory in India, ask for Alloy Steel Opening Flanges free sample.

Please note this is an approx Price of Opening Flanges in India. For final Opening Flanges price in India please mail us.

Opening Flanges Specification

ASME B16.5 Opening Flanges Size Chart 1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Opening Flanges Standards ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Opening Flanges Pressure Rating ANSI Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Opening Flanges
Opening Flanges Pressure Calculation in DIN 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 Opening Flanges
JIS 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K Opening Flanges
UNI 6Bar 10Bar 16Bar 25Bar 40Bar Opening Flanges
EN 6Bar 10Bar 16Bar 25Bar 40Bar Opening Flanges
Coating Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Opening Flanges
Most common types of Opening Flanges Forged / Threaded / Screwed / Plate
Test Certificates EN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc
Production technique
  • Forged, Heat treated and machined
Connect Type/ Flange Face Type Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove
Special design

As per your drawing

AS, ANSI, BS, DIN and JIS
15 NB (1/2") to 200 NB (8")
Equal and Reducing Configurations

Test Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
Equipment Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
Origin Indian / West Europe / Japan / USA / Korean
Manufacturer of

ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc.
Opening Flanges: -BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange

  • B.S: BS4504 , BS3293, BS1560, BS10
  • AS 2129: Table D; Table E; Table H
  • ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
  • ANSI : ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48
  • ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
  • American standard (ANSI)
  • German (DIN)
  • British standard (BS)
  • DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 Opening Flanges
  • The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
Opening Flanges Uses & application
  • Bitumen upgraders.
  • Heavy oil refineries.
  • Nuclear power (mostly seamless).
  • Petrochemicals and acids.
Export to Ireland, Singapore, Indonesia, Ukraine, Saudi Arabia, Spain, Canada, USA, Brazil, Thailand, Korea, Iran, India, Egypt, Oman, Dubai, Peru, etc
Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175

Red Earth Steels PVT LTD is an ISO certified Stainless Steel Opening Flanges manufacturer & distributor in India

Red Earth Steels PVT LTD is a manufacturer and supplier of Opening Flanges offering in all Ratings up to 2500#, built a distribution network with more then 65 countries globally.

Opening Flanges Dimensions

Opening Flanges Dimensions

Stainless Steel Opening Flanges:

Material of construction degree default
stainless steel opening flanges F 304, 304L, 304H, 316,
316Ti, 316H, 316L,
316LN, 309S, 309H,
310S, 310H, 317, 317L,
321, 321H, 347, 347H,
201, 202, 904L
ASTM A182, A240

Alloy Steel Opening Flanges:

Material of construction degree default
alloy steel opening flanges F1, F5, F9, F11, F22, F91 ASTM A182

Inconel Opening Flanges:

Material of construction default degree
Carbon steel opening flanges ASTM A105 Gr. F42,46,52,56,60,65,70
Low Temperature Carbon Steel Orifice Flanges ASTM A350 LF2, LF3

Carbon Steel Opening Flanges:

Material of construction default degree
Carbon steel opening flanges ASTM A105 Gr. F42,46,52,56,60,65,70
Low Temperature Carbon Steel Orifice Flanges ASTM A350 LF2, LF3

Monel Opening Flanges:

Material of construction default degree
Monel opening flanges ASTM SB564, SB160, SB472, SB162 Monel 400 (UN No. N04400), Monel 500 (UN No. N05500)

Nickel Alloy Opening Flanges:

Material of construction default degree
Nickel alloy opening flanges ASTM SB564, SB160, SB472, SB162 Nickel 200 (UN No. N02200), Nickel 201 (UN No. N02201)

Copper Alloy Opening Flanges:

Material of construction default degree
Copper Alloy orifice flanges ASTM SB 61, SB62, SB151, SB152 US No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), US. C 10100, 10200, 10300, 10800, 12000, 12200,

Duplex Opening Flanges:

Material of construction default degree
Duplex orifice flanges ASTM A182, A240 US F 44, F 45, F 51, F 53, F 55, F 60, F 61

Hastelloy Opening Flanges:

Material of construction default degree
Hastelloy orifice flanges ASTM SB564, SB160, SB472, SB162 Hastelloy C 276 (UN No. N10276), Alloy 20 (UN No. N08020)

Supplying Opening Flanges to our worldwide clients:

Red Earth Steels Pvt Ltd. is a Govt. approved certified Carbon Steel Opening Flanges exporter in India. All of our Stainless Steel Opening Flanges are manufactured and tested to international standards, and specifications as per DIN, JIS, EN, ASTM etc. We are well-known as a trusted vendor as a Alloy Steel Opening Flanges distributor & dealer in your country. We have huge stock in Asia, GCC, Gulf, Middle east, UK to supply with over 28 countries, we provide after sales service and fast delivery.


Stock an extensive range of Opening Flanges, Carbon Steel Opening Flanges manufacturer in Mumbai, India

Producing high-strength Alloy Steel Opening Flanges in India, contact Stainless Steel Opening Flanges manufacturers in India, Philippines, Malaysia, UAE & UK