Lap Joint Flanges are essential components in modern piping systems that demand ease of assembly, alignment, and disassembly. At Metafit Piping Industries, a leading name among Lap Joint Flanges Manufacturers in India, we produce premium-grade flanges for industries that value performance, durability, and international compliance. Our flanges are designed to reduce labor costs during installation while enhancing flexibility in maintenance, especially in high-vibration systems.
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What is Lap Joint Flanges?
So, what exactly are Lap Joint Flanges? They are two-piece assemblies consisting of a stub end and a backing flange. Unlike other flange types, they are not welded to the pipe but are instead held in place by pressure. This unique configuration allows for easy alignment and adjustment even after welding, making them a preferred choice for complex and critical piping setups. Metafit Piping Industries stands among the most trusted Lap Joint Flanges Suppliers globally, catering to varying specifications across diverse geographies.
Advantages of Lap Joint Flanges?
One of the biggest advantages of Lap Joint Flanges is their ability to be reused, making them cost-effective for systems that require frequent dismantling. Their design enables rotation, simplifying bolt hole alignment and reducing installation time. Our commitment to quality and consistency places us among the most reliable Lap Joint Flanges Stockists, with flanges available in stainless steel, carbon steel, and duplex steel across multiple pressure ratings and sizes. These flanges also excel in corrosive and high-temperature environments, thanks to their adaptability and sealing capabilities.
Metafit Piping Industries serves a wide spectrum of industries with our world-class Lap Joint Flanges products. Our clients span across the USA, Germany, UAE, Saudi Arabia, South Korea, and Australia, trusting us for precision and durability.
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Industry That Use Lap Joint Flanges?
Lap Joint Flanges are widely used in:
- Lap Joint Flanges in Oil & Gas Industry: Used in pipeline assemblies requiring regular inspection and maintenance.
- Lap Joint Pipe Flanges in Chemical Processing: Chosen for resistance to corrosive chemicals and easy dismantling.
- Lap Joint Flanges for Petrochemical Plants: Vital in systems that face thermal cycling and vibration.
- Industrial Lap Joint Flanges for Power Generation: Installed in high-pressure steam lines for ease of inspection.
- Sanitary Lap Joint Flanges in Food & Beverage: Preferred in hygienic systems due to easy cleaning and alignment.
- Lap Joint Flanges Systems in Water Treatment Plants: Used for their resistance to corrosion and long-term reliability.
Our flanges are manufactured in accordance with global standards including ASME B16.5, DIN 2641/2642, EN 1092-1, and BS4504. Material grades include ASTM A182 F304, F316, A105, A350 LF2, and more, depending on project requirements. As certified Lap Joint Flanges Exporters, we ensure compliance with NACE, IBR, and PED standards, guaranteeing safety and performance across continents.
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Across the globe, Lap Joint Flanges may be known by different names. In Germany and parts of Europe, they are often called “Loose Flanges” or “Loose Collar Flanges.” In the UK and Australia, they're referred to as “Backing Flanges.” In Japan and Korea, the term “Slip-On Backing Ring Flanges” is common. The core function remains consistent—delivering flexibility and alignment accuracy in demanding pipeline systems.
Lap Joint Flanges Specifications?
| ASME B16.5 Long Weld Neck Flanges Size Chart | 1/2" (15 NB) to 48" (1200NB) DN10~DN5000 |
|---|---|
| Long Weld Neck Flange Standards | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Long Weld Neck Flanges, ASME Long Weld Neck Flanges, BS Long Weld Neck Flanges, DIN Long Weld Neck Flanges, EN Long Weld Neck Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| Long Weld Neck Flanges Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Long Weld Neck Flanges |
| Long Weld Neck Flanges Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 Long Weld Neck Flanges |
| JIS long weld neck flange ASME B16.5 | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K Long Weld Neck Flanges |
| UNI carbon steel long weld neck flange | 6Bar 10Bar 16Bar 25Bar 40Bar Long Weld Neck Flanges |
| EN ANSI B16 5 long weld neck flange | 6Bar 10Bar 16Bar 25Bar 40Bar Long Weld Neck Flanges |
| Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Long Weld Neck Flanges |
| Most common types of Long Weld Neck Flanges | Forged / Threaded / Screwed / Plate |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Production technique |
|
| Connect Type/ Flange Face Type | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove |
| Special design |
As per your drawing AS, ANSI, BS, DIN and JIS |
| Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
| Origin | Indian / West Europe / Japan / USA / Korean |
| Long Weld Neck Flange manufacturers |
ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc.
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| Long Weld Neck Flanges Uses & application |
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| Export to ASME B16.5 Long Weld Neck Flanges | Ireland, Singapore, Indonesia, Ukraine, Saudi Arabia, Spain, Canada, USA, Brazil, Thailand, Korea, Iran, India, Egypt, Oman, Dubai, Peru, etc |
| Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 | |
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