Lap Joint Flange
At Metrade, we supply high-quality lap joint flanges engineered for strong performance, long-term durability, and seamless integration into demanding piping systems. This flange design gives operators a practical and cost-effective option for systems that require frequent disassembly or present bolt-hole alignment challenges, making it an ideal choice for maintenance-focused and fast-paced industrial environments. Each lap joint flange reflects our commitment to material strength, precise dimensions, and consistent reliability.
We offer a wide range of sizes, pressure classes, and material grades to support projects across oil & gas, petrochemicals, power generation, water treatment, and major infrastructure sectors. Whether you’re managing a large installation or a specialized operation, Metrade delivers dependable products backed by expert technical support, helping your systems run efficiently, safely, and with complete confidence.
Materials - Carbon Steel
- Low Temperature CS
- Stainless Steel
- Special Stainless Steel
- Alloy Steel
- Nickel Alloy
- Titanium Alloy
Lap Joint Flange
Long Weld Neck
Orifice Weld Neck
Reducing Slip-On
Reducing SocketWeld
Reducing Threaded
Reducing Weld NeckMaterial | Specification | Grades |
|---|---|---|
| Carbon Steel | ASTM A105 | A105 |
| Low Temperature Carbon Steel | ASTM A350 | LF2 and LF3 |
| Stainless Steel and Special Stainless Steel | ASTM A182 | F304/304L, 316/316L, 310, 317, 321, 347, 410, 904, H |
| Alloy Steel(EFW, LSAW, HSAW) | ASTM A182 | F5 / 9 / 11 / 22 / 91 |
| Nickel Alloy 200/201 | B564 | UNS N02200/N02201 |
| Nickel Alloy 276 | B564 | UNS N10276 - Hastelloy C-276 |
| Nickel Alloy 400 | B564 | UNS N04400 - Monel 400 |
| Nickel Alloy 600 | B564 | UNS N06600 - Inconel 600 |
| Nickel Alloy 625 | B564 | UNS N06625 - Inconel 625 |
| Nickel Alloy 800H/800HT | B564 | UNS N08810/N08811 - Incoloy 800H/HT |
| Nickel Alloy 825 | B564 | UNS N08825 - Incoloy 825 |
| Titanium Alloy | B381 | Gr 1 / 2 / 5 / 7 |
A Lap Joint Flange is a two-piece assembly consisting of a stub end and a backing flange, designed primarily for piping systems that require frequent dismantling for inspection, cleaning, or maintenance. Unlike other flange types, the lap joint flange is not welded or fixed permanently to the pipe; instead, it slides over the pipe and is held in place by the pressure of the backing flange against the stub end. This design allows for easy alignment of bolt holes and quick removal of sections, making it highly efficient for systems using low-pressure or non-critical applications. Lap joint flanges are commonly used with carbon steel, stainless steel, and alloy steel pipes, and are compatible with various pressure ratings and pipe sizes. Their corrosion-resistant properties and cost-effectiveness make them ideal for industries such as chemical processing, petrochemical plants, water treatment facilities, and food and beverage production.