ANSI B16.5 / ASME B16.47 Backing Ring Flange Supplier, Manufacturer in India

ANSI B16.5 / ASME B16.47 Backing Ring Flange Supplier, Manufacturer

Unichem Steel & Alloy Pvt. Ltd. is an expert Manufacturer, Supplier, and Exporter for all standards of Backing Ring Flanges. A Backing Ring Flange is designed to attach sections of pipe or tube or to affix the pipe or tube to an assembly like a pressure vessel, valve, or pump. Backing Ring Flange is joined by bolting, and sealing is completed with the utilization of gaskets and other sealing methods and fixed to the piping system by welding or threading. to achieve optimum client satisfaction, we ensure safe packaging and prompt delivery of the ordered consignment. Our offered SS Backing Ring flange is being developed and designed in accordance by means of the international quality of standards at our infrastructure facility to achieve the highest scales of quality. Keeping in mind the ever-evolving requirements of our respected clients, we are involved in supplying a broad range of Backing Ring Flange in India. Our Backing Ring Flange is manufactured consistent with ANSI, AWWA, JIS, DIN, EN1092-1, BS4504, GOST, SANS1123 standard, etc, and that we also can manufacture Backing Ring Flange consistent with customers drawings. Welcome global advertisers to contact us, we’ll provide professional product solutions.

Largest Stockist of ANSI B16.5 / ASME B16.47 Backing Ring Flanges, DIN Backing Ring Flange, Series A & B Back up Flanges, MSS Backing Ring Flange, BS10 Backing Ring Flange, AWWA Backing Ring Flange, ISO Backing Ring Flange, UNI Backing Ring Flange, API Backing Ring Flange, GOST Standard Backing Ring Flange in Mumbai.

Most Trusted Exporters of ANSI/ASME B16.5, ANSI/ASME B16.47 Backing Ring Flanges in South Africa, Saudi Arabia, Spain, Kuwait, Singapore, Malaysia, UAE, Italy, Nigeria, Iraq, Thailand, Turkey, Vietnam, Oman, Qatar, Myanmar, Sri Lanka.

ASME B16.5 Backing Ring Flange Specifications


ASTM A182, A 240, A105, A350, A694, A516 / ASME SA182, SB240, SA 105, SA350, SA694

Standards / Dimensions

ANSI B16.47, MSS SP44, ANSI B16.5, Series A & B, ASA, API-605, AWWA, B16.48, BS 10, BS4504, EN-1092, DIN.

Size & Thickness

½” (15 NB) to 48″ (1200NB)

Pressure Class

PN6, PN10, PN16, PN25, PN40, PN64 etc.

ANSI B16.5 / ASME B16.47 Backing Ring Flange Specifications
Flange Class

150#, 300#, 400#, 600#, 900#, 1500#, 2500#.


Back up Flange

Flange Face Type

Flat Face (FF), Raise Face (RF), Ring Joint (RJT)

Connection Type

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

Leading Manufacturers of Different Types of ASTM A182 Stainless Steel Flanges in the form of Slip On Flange | Weld Neck Flange | Blind Flange | Lap Joint Flange | Threaded Flange | Socket Weld Flange | Plate Flange | Ring Joint Type Face | Spectacle Blind Flange | High Hub Blinds | Orifice Flanges | Reducing Flanges | Square Flanges | Groove & Tongue Flanges | Long Neck Weld Flanges | Spades and Ring Spacers Flange | Weldo Flange | Nipo Flange | Expander Flange at Best Prices in India.

ANSI B16.5 / ASME B16.47 Backing Ring Flange Dimensions

ANSI B16.5 / ASME B16.47 Backing Ring Flange Dimensions

Galvanised Backing Flange Dimensions

Size Pipe Overall Internal PCD Thick Thick Hole No of Approx.
NB Dia. Dia. ness ness Dia. Holes Wgt
Tube Standard 86037
(mm) mm mm (Kg)
20 / 25 102 33 73 6 16 14 4 0.67
25 / 30 114 40 83 7 16 14 4 0.85
32 / 38 121 48 87 8 16 14 4 0.90
40 / 44.5 133 54.5 98 9 16 14 4 1.13
50 / 57 152 69 114 10 16 17.5 4 1.44
65 / 76 165 88 127 10 16 17.5 4 1.51
80 / 89 184 101 146 11 18 17.5 4 1.97
100 / 108 216 120 178 13 18 17.5 8 2.54
125 / 133 254 145.5 210 13 18 17.5 8 2.58
150 /159 279 171.5 235 17 18 22 8 4.39
200 / 219 337 232 292 19 20 22 8 7.39
250 / 267 406 280 356 22 22 22 12 11.57
300 /324 457 341 406 25 24 26 12 14.37

Why Purchase From Unichem Steel & Alloy Pvt. Ltd.

  • Unichem Steel & Alloy Pvt. Ltd. strive for quality production of ANSI/ASME B16.5 Backing Ring Flanges. We adequately test raw materials and confirm to ASTM, ASME, DIN, EN, JIS Standards to make the highest quality Backing Ring Flanges. Back up Flanges is provided with 100% Radiography Test Report and Third Party Inspection or Buyer Inspection service is available on finished products.
  • Value Added Services are provided such as Epoxy & FBE coating, Sandblasting, Hot dipped galvanizing, Electropolish or other special finishes, Threading, soldering, Custom shape cutting, fabrication services on ANSI 16.47 Backing Ring Flanges.
  • Unichem Steel & Alloy Pvt. Ltd. is an expert in manufacturing custom size ANSI/ASME B16.47 Backing Ring Flanges with accurate dimensions and uniform wall thickness.
  • We are presently equipped with modern manufacturing equipment and inspection tools such as Lathe Machines, Milling Machine, Heating & Annealing Furnaces, forging and deep drawing presses, machining, finishing, and testing facilities. In order to maintain reliability and quality of our EN 1092-1 Backing Ring Flange, MSS SP-44 Backing Ring Flanges, ISO Standard Backing Ring Flanges.
  • As leading exporters and suppliers we keep a buffer stock of ASME B16.5 Backing Ring Flanges in all grades from ½” NB to 48” NB in Sch 10s, the 40s, 80s, 160s, XXS In order to meet the off-hand requirement of our clients.
  • ANSI/ASME B16.5 Flanges, ANSI/ASME B16.47 Backing Ring Flanges are packaged to ensure that there is no damage during transit. In the case of exports, products are packed in wooden cases. All Backing Ring Pipe Flanges are marked with Size, Lot No, Grade, Degree, and our trademark. On special requests we make custom marking on Backing Ring Flanges.
  • Test Certificates: Raw Materials Certificate, Manufacturer Test Certificate as per EN 1092 / 3.1B, Third Party Inspection Report, 100% Radiography Test Report.
  • No minimum quantity order limit. Get Market leading prices on all types of Industrial Backing Ring Flange in India.

ASME B16.5 Backing Ring Flanges Material & Grades

Stainless Steel Backing Ring Flange
ASTM / ASME A/SA 182: F 304, 304L, 304H, 309S, 309H, 310S, 310H, 316, 316TI, 316H, 316L, 316LN, 317, 317L, 321, 321H, 347, 347H, 904L.
Carbon Steel Backing Ring Flange
ASTM A105/A694/ A350 LF3/A350 LF2: F42, F46, F52, F56, F60, F65, F70
Alloy Steel Backing Ring Flange
ASTM A182: F1, F5, F9, F11, F22, F91
Duplex & Super Duplex Steel Backing Ring Flange
ASTM / ASME A/SA 182: F44, F45, F51, F53, F55, F60, F61.
Nickel Alloy Backing Ring Flange
ASTM / ASME SB 564 / 160 / 472: UNS 2200 (NICKEL 200), UNS 4400 (MONEL 400), UNS 8825 INCONEL (825), UNS 6600(INCONEL 600), UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276), UNS 2201 (NICKEL 201), (ALLOY 20 / 20 CB 3)

ASME B16.5 Backing Ring Flanges Manufacturing Standards

ASME Standard ANSI B16.5, ANSI B16.47, ANSI B16.36, ANSI B16.48, BS 4504, UNI 2277/2278,, JIS, SABS1123, GOST-12820
DIN Standard DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673
EN Standard EN1092
ASTM A182 – ASME SA182 Standard Specification for Wrought Austenitic SS Pipe Flanges
MSS SP-44 Pipe Flange

Backing Ring Flanges Type, Size, and Pressure Class

Specification Pressure Class Size Range
ASME/ANSI B16.5 150 to 2500LBS
150 to 1500LBS
26“ to 60″
26“ to 48″
ASME/ANSI B16.36 300 To 2500LBS 1″ to 12″
ASME/ANSI B16.47 75 to 300LBS
400, 600LBS
1/2“ to 12″
26“ to 60″
26“ to 48″
BS 10 TABLE-A, D, E, F, H, J, K, R, S, T 15mm to 600mm
EN 1092-1 / DIN / BS 4504 Flanges PN2.5 to PN16
PN160, PN250
10mm to 1800mm
10mm to 1000mm
10mm to 600mm
10mm to 400mm
10mm to 350mm
10mm to 300mm
10mm to 250mm
10mm to 200mm

Ready Stock of ASME B16.47 Backing Ring Flanges in India

Backing Ring Raised Face Flange Raised Faced Backing Ring Flanges
ANSI B16.5 Backing Ring Flanges Backing Ring Flange Dimensions
ASME B16.5 Back up Flanges ANSI B16.5 Class 150 Backing Ring Flanges
Stainless Steel Backing Ring Flanges SS Backing Ring Flange
Backing Ring Plate Flanges Dealer ASME B16.47 Series A and B Back up Flanges
ANSI B16.5 class 150 Back up Flange ANSI 150 Backing Ring Flange
Carbon Steel Backing Ring Flange High Quality Back up Flanges
ASTM A182 Stainless Steel Back up Flange Duplex Steel Backing Ring Flange
Super Duplex Steel Backing Ring Forged Flange Copper Nickel Backing Ring Pipe Flanges
High Nickel Alloy Back up Flanges Hastelloy Flat Faced Backing Ring Flanges
Titanium ASME B16.47 Series A and B Back up Flanges Inconel Backing Ring Flanges

ANSI B16.5 Backing Ring Flange Dimensions Tolerance

Outside Diameter:

≤ 24 = 1.6 mm | > 24 = ± 3.2 mm

Inside Diameter:

not applicable

Diameter of Contact Face:

1.6 mm Raised Face = ± 0.8 mm6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm

Outside Diameter of Hub:

≤ 12 = + 2.4 mm / – 1.6 mm | ≥ 14 = ± 3.2 mm

Diameter of Counterbore:

not applicable


Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mmEccentricity of Bolt Circle with Respect to Facing≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max.


≤ 18 = + 3.2 mm / – 0 | ≥ 20 = + 4.8 mm / – 0

Length thru Hub:

≤ 18 = + 3.2 mm / – 0.8 mm | ≥ 20 = + 4.8 mm / – 1.6 mm

ASME B16.47 Backing Ring Flanges Applications and Uses

  • Power Plant / Power Generation
  • Fertilizers
  • Oil & Gas
  • Refineries
  • Chemical Industry
  • Pulp and Paper Industry
  • Petrochemicals
  • Engineering Project
  • Environmental and Water Projects
  • Boiler Manufacturers
  • Pumps and Valves
  • Cement Industries
  • Aerospace Industry
  • Nuclear Industry
  • Construction
  • Ship Building Companies
  • Thermal Processing
  • Pharma Industry
  • Off-Shore Oil Drilling Companies
ASME B16.47 Backing Ring Flanges Applications and Uses

ANSI/ASME B16.5 Backing Ring Flange Exporter

EUROPE: Albania, Austria, Belgium, Croatia, Czech Republic, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Malta, Netherlands, Norway, Portugal, Russia, Slovakia, Slovenia, Spain, Switzerland, UK, Ukraine.
ASIA: Bangladesh, Cambodia, India, Indonesia, Japan, Malaysia, Maldives, Myanmar, Singapore, South Korea, Sri Lanka, Taiwan, Thailand, Vietnam.
AFRICA: Algeria, Angola, Egypt, Equatorial Guinea, Gabon, Libya, Nigeria, South Africa, Sudan, The Republic Of Congo.
MIDDLE EAST: Bahrain, Cyprus, Iran, Iraq, Jordan, Kuwait, Oman, Qatar, Saudi Arabia (KSA), Syria, Turkey, United Arab Emirates (UAE), Yemen.
NORTH AMERICA: Bahamas, Canada, Costa Rica, Denmark, Jamaica, Mexico, Panama, Puerto Rico, Trinidad And Tobago, USA.
SOUTH AMERICA: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Uruguay, Venezuela.

ANSI/ASME B16.47 Backing Ring Flange Supplier

Aberdeen, Abu Dhabi, Ahmedabad, Ahvaz, Al Jubail, Al Khobar, Algiers, Ankara, Atyrau, Bangkok, Bengaluru, Bhopal, Bogota, Brisbane, Busan, Cairo, Calgary, Caracas, Chandigarh, Chennai, Chiyoda, Coimbatore, Colombo, Courbevoie, Dallas, Dammam, Doha, Dubai, Edmonton, Ernakulam, Faridabad, Geoje-si, Gimhae-si, Granada, Gurgaon, Hanoi, Haryana, Ho Chi Minh City, Hong Kong, Houston, Howrah, Hyderabad, Indore, Istanbul, Jakarta, Jeddah, Karachi, Kolkata, Kuala Lumpur, Kuwait City, La Victoria, Lagos, Lahore, London, Los Angeles, Ludhiana, Madrid, Manama, Melbourne, Mexico City, Milan, Montreal, Moscow, Mumbai, Muscat, Navi Mumbai, New Delhi, New York, Noida, Perth, Petaling Jaya, Pimpri-Chinchwad, Port-of-Spain, Pune, Rajkot, Rio de Janeiro, Riyadh, Santiago, Secunderabad, Seoul, Sharjah, Singapore, Surat, Sydney, Tehran, Thane, Thiruvananthapuram, Toronto, Ulsan, Vadodara, Visakhapatnam, Vung Tau.

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