What is Lap Joint Flange

Lap joint flange RTJ (Ring Type Joint) has a raised face with the groove machined to the face of flange in order to accept metal ring gaskets.

Lap joint flange and lap joint stub end are used together as a assemble system. The stub end will connect with the pipe and lap joint flange slide over the pipe. The flange itself is not fixed to pipes in any way, so that it is free to spin for proper alignment. This flange pairs usually used in low pressure applications without high loads on them.

Zizi offers forged flanges and pipe fittings in various materials such as stainless steel, super duplex stainless steel, carbon steel, alloy steel, copper alloy and nickel alloy.

Orders for Lap Joint Flange

Dimensions: 8” Class 600

Seal: Ring Type Joint (RTJ) Sch80

Material: UNS C71500 (CU-NI-70/30)

Standard: ASME B16.5

Shipment for Lap Joint Flange RTJ

Delivery port: Shanghai, Tianjin, Qingdao

Lead time: 10 days are ready to deliver

Package: Plastic Film, Wooden Cases.

Shipment: LCL, 20GP, 40GP, Air, Courier

Document: CI, PL, CO, BL, MTC

Certificate: CE, ISO, TEST REPORT

Copper Nickel Flange

Copper Nickel Lap Joint Flange RTJ C71500 has advantages of great corrosion resistance, outstanding mechanical and physical properties as well as easy to shape, fabricate and weld. They are widely used in ship building, chemical and petroleum industry.

Advantages of Lap Joint Flange and Stub End

1. Saving cost when the pipe is made of exotic materials.
2. Facilitate the lining up of opposing flange bolt holes.
3. More durable due to the flange is not direct contact with the fluid inside.
4. May be salvaged for re-use.

When to Use Lap Joint Flange RTJ

• Pipe system is assemble and disassemble frequently.
• In a corrosive situation, the flange joints need to be exchange very soon.
• It can work for more complicated applications

Supply Range of Forged Flanges

Standard	ASME B16.5, ASME B16.47
Diameter	1/2 to 24 Inch / DN15 — DN600
Pressure	Class 150, 300, 600, 900, 1500, 2500
Seal	RF. RTJ, FF
Products	Weld Neck Flange, Socket Weld Flange, Threaded Flange, Blind Flange, Spectacle Blind, Slip On Flange, Ring Joint Flange, Plate Flange.

Nickel Alloy Lap Joint Flange
UNS 2200 / NICKEL 200 , UNS 2201 / NICKEL 201 , UNS 4400 / MONEL 400, UNS 8020 / ALLOY 20 / 20 CB 3, UNS 8825 / INCONEL825, UNS 6600 / INCONEL 600, UNS 6601 / INCONEL 601 , UNS 6625 / INCONEL 625, UNS 10276 / HASTELLOY C 276

Stainless Steel Lap Joint Flange
ASTM A182 F304/ 304L, F306/ 316L, F309S/309H, F310, F317, F321, F347, F347H, F454L

Duplex & Super Duplex Steel Lap Joint Flange
ASTM A 182 – F 51, F53, F55 S 31803, S 32205, S 32550, S 32750, S 32760, S 32950.

Carbon Steel Lap Joint Flange
ASTM/ ASME A 105, ASTM/ ASME A 350 LF 2, ASTM / ASME A 53 GR. A & B, ASTM A 106 GR. A, B & C. API 5L GR. B, API 5L X 42, X 46, X 52, X 60, X 65 & X 70. ASTM / ASME A 691 GR A, B & C

Alloy Steel Lap Joint Flange
ASTM / ASME A 182 F1, F5, F9, F11, F12, F22, F91

Copper Alloy Lap Joint Flange RTJ

ASTM / ASME SB 111 UNS NO. C 10100, C 10200 , C 10300 , C 10800 , C 12000, C 12200, ASTM / ASME SB 466 UNS NO. C 70600 ( CU -NI- 90/10) , C71500 ( CU -NI- 70/30)