ISO Flange Standard Supplier, Manufacturer in India

ISO Flange Supplier, Manufacturer

Unichem Steel & Alloy Pvt. Ltd. is a growing, and well-recognized name in the Manufacturing and Exporting of the ISO Flanges also called Large ISO to have a sexless design and are made of 304L stainless or aluminum. The ISO-K is convenient and has the flange O.D. for any given tube I.D. A range of bolt options permit joints between mixed ISO-K and -F flanges. The illustrations show various possible clamping arrangements. The world organization for Standardization also referred to as the ISO is a global standard-setting body. International Standards Organization (ISO) marks standards also as guidelines for various businesses and purposes also as publishes technical reports. The world organization for Standardization was also mentioned because the ISO is a global standard-setting body. The ISO Flange consists of representatives from various national standard organizations. International Standards Organization (ISO) marks standards also as guidelines for various businesses and purposes also as publishes technical reports. The ISO 5211 Mounting Flange is used to permit a shutter or lens to be installed onto a lens board.

Largest Stockist of ISO Flanges, ISO 9624 Flange, ASME B16.5 / ANSI B16.47 ISO 9624 Flange, ISO 9624 Flange, ISO 7005-1 Flanges in Mumbai.

Most Trusted Exporters of ISO Flanges in South Africa, Saudi Arabia, Spain, Kuwait, Singapore, Malaysia, UAE, Italy, Nigeria, Iraq, Thailand, Turkey, Vietnam, Oman, Qatar, Myanmar, Sri Lanka.

ISO 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.

ISO Flange Specifications
Flange Class

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



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.

ISO Flange Dimensions

ISO PN10 Flange Dimensions

ISO PN16 Flange Dimensions

Why Purchase From Unichem Steel & Alloy Pvt. Ltd.

  • Unichem Steel & Alloy Pvt. Ltd. strive for quality production of ISO Flanges. We adequately test raw materials and confirm to ASTM, ASME, DIN, EN, JIS Standards to make the highest quality ISO Flanges. ISO 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 ISO Flanges.
  • Unichem Steel & Alloy Pvt. Ltd. is an expert in manufacturing custom size ISO 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 ISO Flange, MSS SP-44 ISO Flanges, ISO Standard Flanges.
  • As leading exporters and suppliers we keep a buffer stock of ISO 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.
  • ISO Flanges are packaged to ensure that there is no damage during transit. In the case of exports, products are packed in wooden cases. All ISO Pipe Flanges is marked with Size, Lot No, Grade, Degree, and our trademark. On special requests we make custom marking on ISO 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 ISO Flanges in India.

ISO Flanges Material & Grades

Stainless Steel ISO 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 ISO Flange
ASTM A105/A694/ A350 LF3/A350 LF2: F42, F46, F52, F56, F60, F65, F70
Alloy Steel ISO Flange
ASTM A182: F1, F5, F9, F11, F22, F91
Duplex & Super Duplex Steel ISO Flange
ASTM / ASME A/SA 182: F44, F45, F51, F53, F55, F60, F61.
Nickel Alloy ISO 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)

ISO 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 / ISO 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 ISO Flanges in India

ISOISO 7005-1 / 9624 Forged Flanges ISOISO 7005-1 / 9624 Blind Flanges
ISOISO 7005-1 / 9624 Reducing Flanges ISOISO 7005-1 / 9624 Orifice Flanges
ISOISO 7005-1 / 9624 Socket Weld Flanges ISOISO 7005-1 / 9624 Slip On Flanges
ISOISO 7005-1 / 9624 Flat Flanges ISOISO 7005-1 / 9624 Lapped Joint Flanges
ISOISO 7005-1 / 9624 SWRF Flanges ISOISO 7005-1 / 9624 Square Flanges
ISOISO 7005-1 / 9624 Threaded Flanges ISOISO 7005-1 / 9624 Weld Neck Flanges Series A or B
ISOISO 7005-1 / 9624 WNRF Flanges ISOISO 7005-1 / 9624 Expander Flanges
ISOISO 7005-1 / 9624 High Hub Blinds Flanges ISOISO 7005-1 / 9624 Spectacle Blinds Flanges
ISOISO 7005-1 / 9624 Loose Flanges ISOISO 7005-1 / 9624 RTJ Flanges
ISOISO 7005-1 / 9624 Screwed Flanges ISOISO 7005-1 / 9624 Weld Neck Flanges
ISOISO 7005-1 / 9624 Flange Facing Type & Finish ISOISO 7005-1 / 9624 SORF Flanges
ISOISO 7005-1 / 9624 Groove & Tongue Flanges ISOISO 7005-1 / 9624 Long Neck Weld Flanges
ISOISO 7005-1 / 9624 Spades Ring Spacers Flanges ISOISO 7005-1 / 9624 Ring Type Joint Flanges

ISO 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

ISO 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
ISO Flanges Applications and Uses

ISO 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.

ISO 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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