LAP-JOINT FLANGES
Lap Joint Flanges ASME B16.5 Manufacturers, Exporters & Suppliers in India.304/304L Lap Joint Flanges (SOLJ), 310/310S Lap Joint Flanges (SOLJ), 316/316L Lap Joint Flanges (SOLJ), 317/317L Lap Joint Flanges (SOLJ), 321/321H Lap Joint Flanges (SOLJ), 347/347H Lap Joint Flanges, 446 Lap Joint Flanges. Stainless Steel, Alloy Steel, Carbon Steel, Duplex steel, Copper Nickel Alloy, Hastelloy, Titanium, Alloy 20, Monel & Inconel Lap Joint Flanges.
Pentagon Steel India stands as a premier manufacturer, supplier, and exporter of lap joint flanges (SOLJ) in India, offering a wide range of materials including stainless steel (304/304L, 310/310S, 316/316L, 317/317L, 321/321H, 347/347H, 446), alloy steel, carbon steel, duplex steel, copper nickel alloy, hastelloy, titanium, alloy 20, monel, and inconel.
Lap Joint Flanges are specifically designed for use with stub ends or taft connections, where the flange itself is not welded to the pipe but instead floats freely over it. This design is ideal for systems that require frequent disassembly or maintenance. The flange is placed over the pipe and, when tightened against the stub end, provides a secure, leak-proof seal. Because the flange does not contact the conveyed fluid, it is highly suitable for applications involving corrosive environments or materials that might wear out other flange types.
These flanges are highly versatile and are commonly used in industries such as petrochemicals, oil and gas, chemical processing, power generation, and more. They are especially valuable in systems where space is limited, as their design allows for easy alignment, reducing the effort and time required for installation and removal.
By offering a broad selection of materials, Pentagon Steel India ensures that its lag joint flanges meet the diverse needs of global clients. Whether for high-pressure, high temperature, or corrosive conditions, these flanges deliver outstanding durability, reliability, and performance across a variety of applications.
We are a manufacturer and exporter of stainless steel flanges, alloy steel flanges, carbon steel flanges, duplex steel flanges, monel flanges, and Inconel flanges.
- Stainless Steel Flanges: As the name implies, these are constructed of stainless steel, a material commonly used to make flanges.
- Alloy Steel Flanges: These steels are alloyed with additional materials to increase their mechanical qualities.
- Carbon Steel Flanges: The higher carbon content provides
Flanges made of stainless steel, alloy steel, carbon steel, duplex steel, monel, and inconel.ASTM / ASME - A 182 / 240, SA 182 / 240 Flanges,
Material of Construction | Standard | Grades |
Stainless Steel Lap Joint Flanges | ASTM A182 , A240 | F 304, 304L, 304H, 316, 316Ti, 316H, 316L, 316LN, 309S, 309H, 310S, 310H,317, 317L, 321, 321H, 347, 347H, 201, 202, 904L |
Carbon Steel Lap Joint Flanges | ASTM A105 | Gr. F42,46,52,56,60,65,70 |
Alloy Steel Lap Joint Flanges |
ASTM A182 | F1,F5,F9,F11,F22,F91 |
Nickel Alloy Lap Joint Flanges |
ASTM SB564, SB160, SB472, SB162 | Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), |
Copper Alloys Lap Joint Flanges | ASTM SB 61 , SB62 , SB151 , SB152 | UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200, |
Low Temperature Carbon Steel Lap Joint Flanges | ASTM A350 | LF2 , LF3 |
Duplex Steel Lap Joint Flanges | ASTM A182, A240 | UNS F 44, F 45, F51, F 53, F 55, F 60, F 61 |
Outside Diameter ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm |
Inside Diameter ≤ 10 = ± 0.8 mm | ≥ 12 = + 1.6 mm / - 0 mm |
Diameter of Contact Face 1.6 mm Raised Face = ± 0.8 mm 6.35 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 Same as for Inside Diameter |
Drilling Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max. |
Thickness ≤ 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 |