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

ANSI B16.5 / ASME B16.47 Square Flange Supplier, Manufacturer

Unichem Steel & Alloy Pvt. Ltd. is one of the simplest Manufacturers and Exporters of Square Flanges which are utilized in hydraulic systems to attach a pipe to a component or a pipe to pipe connection. as the name implies, Square Flanges are squarely shaped. It makes in accordance with different standards based on various countries, Square Flanges are available for different pressure ratings in order to fulfill their purpose. With square flanges, you’ll ensure seamless flow of liquids through stainless and steel pipes or the other hydraulic systems. Square flanges are available in different sizes from 1/4 inches to 6 inches. The common size for system installation is 1/2 to 2 inches. The square flange is often classified as two materials which are steel or chrome steel. it’s made from SF440A steel or SS316 stainless steel. they’re made to fit the standards of JIS B2291 also as JIS F7806. Square flanges can withstand high pressure moving connected pipe, and there are three different pressure scales: 210kg/cm², 280kg/cm², and 350kg/cm². The square flange is very useful in multiple high-pressure industries like connections between pipes, also as between pipes and other components that are necessary to induce a full system working. The square flange can add many various situations, but it’s considered most useful when working in small diameter pipes. it’s not recommended for larger diameter pipes, where there’s an oversized weight load working within. the square flange isn’t ideal to work well under a high torque environment. a whole set of Square Flanges included 5 important parts. it’s 1 piece of female side, label as Aside, 1 piece of male side, label as B side, 4 pieces of hexagon or Allen cap screws, 1 piece of NBR 70/90 oring, and 4 pieces of hexagon nut.

Largest Stockist of ANSI B16.5 / ASME B16.47 Square Flanges, Square Forged Flange, DIN Square Flange, MSS Square Flange, Raised Face Square Flange, BS10 Square Flange, AWWA C207 Square Flange, ISO Square Flange, UNI Square Flange, API Square Flange, GOST Standard Square Flange in Mumbai.

Most Trusted Exporters of ANSI/ASME B16.5, ANSI/ASME B16.47 Square 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 Square 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 Square 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.

ANSI B16.5 / ASME B16.47 Square Flange Dimensions

  • SHAB – Used with hexagon hex bolts, larger flange body size (Figure 1)
  • SSAB – Used with socket cap screw, smaller flange body size than SHAB (Figure2)
  • LSA – Oring side only, L shaped internal flow (Figure 3)
SHA Square Flanges SHB Square Flanges
  • Impa Code: 734801 15A SHA Square Flange
  • Impa Code: 734802 20A SHA Square Flange
  • Impa Code: 734803 25A SHA Square Flange
  • Impa Code: 734804 32A SHA Square Flange
  • Impa Code: 734805 40A SHA Square Flange
  • Impa Code: 734806 50A SHA Square Flange
  • Impa Code: 734807 65A SHA Square Flange
  • Impa Code: 734808 80A SHA Square Flange
  • Impa Code: 734811 15A SHB Square Flange
  • Impa Code: 734812 20A SHB Square Flange
  • Impa Code: 734813 25A SHB Square Flange
  • Impa Code: 734814 32A SHB Square Flange
  • Impa Code: 734815 40A SHB Square Flange
  • Impa Code: 734816 50A SHB Square Flange
  • Impa Code: 734817 65A SHB Square Flange
  • Impa Code: 734818 80A SHB Square Flange
SSA Square Flanges SSB Square Flanges
  • Impa Code: 734821 15A SSA Square Flange
  • Impa Code: 734822 20A SSA Square Flange
  • Impa Code: 734823 25A SSA Square Flange
  • Impa Code: 734824 32A SSA Square Flange
  • Impa Code: 734825 40A SSA Square Flange
  • Impa Code: 734826 50A SSA Square Flange
  • Impa Code: 734827 65A SSA Square Flange
  • Impa Code: 734828 80A SSA Square Flange
  • Impa Code: 734831 15A SSB Square Flange
  • Impa Code: 734832 20A SSB Square Flange
  • Impa Code: 734833 25A SSB Square Flange
  • Impa Code: 734834 32A SSB Square Flange
  • Impa Code: 734835 40A SSB Square Flange
  • Impa Code: 734836 50A SSB Square Flange
  • Impa Code: 734837 65A SSB Square Flange
  • Impa Code: 734838 80A SSB Square Flange

Why Purchase From Unichem Steel & Alloy Pvt. Ltd.

  • Unichem Steel & Alloy Pvt. Ltd. strive for quality production of ANSI/ASME B16.5 Square Flanges. We adequately test raw materials and confirm to ASTM, ASME, DIN, EN, JIS Standards to make the highest quality Square Flanges. Square 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 Square Flanges.
  • Unichem Steel & Alloy Pvt. Ltd. is an expert in manufacturing custom size ANSI/ASME B16.47 Square 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 Square Flange, MSS SP-44 Square Flanges, ISO Standard Square Flanges.
  • As leading exporters and suppliers we keep a buffer stock of ASME B16.5 Square 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 Square Flanges are packaged to ensure that there is no damage during transit. In the case of exports, products are packed in wooden cases. All Square Pipe Flanges are marked with Size, Lot No, Grade, Degree, and our trademark. On special requests we make custom marking on Square 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 Square Flanges in India.

ASME B16.5 Square Flanges Material & Grades

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

ANSI B16.5 / ASME B16.47 Square Flange Dimensions

  • 150 Square Flange : 8 Holes Ø 10
  • 200 Square Flange: 12 Holes Ø 12
  • 250 Square Flange: 12 Holes Ø 12
  • 300 Square Flange: 12 Holes Ø 14
  • 400 Square Flange: 12 Holes Ø 14
  • 500 Square Flange: 16 Holes Ø 14
  • 600 Square Flange: 16 Holes Ø 18
  • 700 Square Flange: 20 Holes Ø 18
  • 800 Square Flange: 20 Holes Ø 18

ASME B16.5 Square 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

Square 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 Square Flanges in India

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

ANSI B16.5 Square 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 Square 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 Square Flanges Applications and Uses

ANSI/ASME B16.5 Square 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 Square 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.

Contact us to get a quick quote for ANSI B16.5 / ASME B16.47 Square Flanges.


Request a Quote —>