JF Engineering Products LLP

ANSI/ASME B16.5 LAP JOINT FLANGE – Stainless Steel ASTM A182 316L, 317L, 310S

Stainless Steel ASTM A182 F316/316L/316H Lap Joint Flange, Monel ASTM B564 400/K500 Lap Joint Flange, Nickel 200/201 Lap Joint Flange, ANSI B16.5 ASTM A182 Inconel 600/601/625 Lap Joint Flange, Incoloy 800/800H/800HT Lap Joint Flange, Titanium Gr1/Gr2/Gr5/gr11 Lap Joint Flange, SS ASTM A182 304, 904L, 321 Lap Joint Flange, SS ASTM A403 309S, 347 Lap Joint Flange, Carbon Steel ASTM A105 Lap Joint Flange, Duplex Steel ASTM A182 F44/F45/F51 Lap Joint Flange, Duplex Steel ASTM A182 F53/F55/F56 Lap Joint Flange, Alloy Steel F11/F22/F91 Lap Joint Flange

JF Engineering offers Lap joint pipe flanges in all available material, size and dimensions. Lap Joint pipe flanges slide over the pipe and are utilized with stub end fittings. It is allowed to turn around the stub end and it ensures you that there will not be any issues with bolt hole alignment. It is used in the applications that need frequent dismantling.

ANSI/ASME B16.5 Lap Joint Flanges with the stub end used in piping systems where bolting pressure is transmitted to the gasket by the pressure of the flange against the back of the pipe. These includes in various materials such as stainless steel, carbon steel, alloy steel, monel and nickel available in number of classes like 150LB, 300LB, 400LB, 600LB, 900LB, 1500LB according to the customer specification.

Advantages of Lap Joint Flange:
  • It permits the use of inexpensive carbon steel flanges with corrosion resistant pipe.
  • The flanges may be salvaged for re-use.
  • Freedom to swivel around the pipe.
Specification - ASME B16.5 Lapped Joint Flange

Lapped Joint Flange

Size: 1/2"NB TO 24"NB IN
Class: 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS DIN Standard ND-6,10, 16, 25, 40 Etc.
Materials: Monel :
Grade: Monel 400, Monel K500, Monel R-405
Nickel :
Grade: Nickel 200, Nickel 201
Inconel :
Grade: Inconel 600, Inconel 601, Inconel 625, Inconel 718
Incoloy :
Grade: Incoloy 800, Inconel 800H, 800HT
Hastalloy :
Grade: Hastalloy B2, Hastalloy B3, Hastalloy C22, Hastalloy C276, Hastalloy X
Titanium :
Grade: Gr1, Gr2, Gr3, Gr5, Gr7, Gr11
Stainless Steel :
Grade: ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L
Carbon Steel :
Grade: ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70 (Spectacle Blind Flange, Spacer Ring/Spade Flange), Steel RST37.2, C22.8
Duplex Steel:
Grade: ASTM / ASME A/SA 182 UNS F44, F45, F51, F53, F55, F60, F61
Alloy Steel:
Grade : ASTM A182 F1, F5, F9, F11, F22, F91
Value Added Service: CNC Machine, Customized Flanges
Coating/Surface Treatment: Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized
Dimension - ASME B16.5 Lapped Joint Flange

NPS 1/2 - ID = 22.9 - r = 3

CL 150 300 600 900 1500 2500
30 38 38 38 38 43
90 95 95 120 120 135
11.2 14.3 14.3 22.3 22.3 30.2
60.3 66.7 66.7 82.6 82.6 88.9
H 16 22 22 32 32 40
4 4 4 4 4 4
15.9 15.9 15.9 22.2 22.2 22.2
Stud Bolts Diameter x Length
1/2 1/2 1/2 3/4 3/4 3/4
55 65 75 110 110 120
Other Diameters
NPS 1/2 3/4 1 2
3 4 6 8 10 12
14 16 18 20 24    


  • Dimensions are in millimeters unless otherwise indicated.
  • The length of the Stud Bolt does not include the height of the chamfers (points).

Marking and Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All flanges are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.

Quality Assurance

At JF Engineering Products LLP, all fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality conformity of products.

Test Certificates

Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report

Shipping Policy

Delivery time and delivery dates are based on the "type and quantity" of steel ordered. Our sales team will provide a delivery schedule when quoting to you. On rare occasions the delivery schedule may change so please check with our sales department when placing any orders.

Orders will be sent out within 2-3 business days, and may take up to 5-10 business days in transit. If Flange is out of stock, orders may take up to 2-4 weeks to ship. JF Engineering Products LLP will notify buyer if this situation occurs..

Uses & Application

JF Engineering Products LLP take immensure pleasure in introducing itself as one of the leading Manufacturer & Exporter of high quality ASME B16.5 Lapped Joint Flanges to meet the customer ultimate requirements in the fields of:

Chemical Oil Mills Petrochemical Mining Refineries Construction
Fertilizers Shipbuilding Power Plant Steel Plant Nuclear Power Offshore
Oil & Gas Defence Paper Ports Breweries Railway
Cement Engineering Co. Sugar & Government Org. etc.

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