Lap Joint Flanges

Your Professional Lap Joint Flanges Supplier

Shanxi Hongkai Forging Co., Ltd. is located in China Energy Heavy Chemical Industry Base. Dingxiang County, the hometown of forging in Shanxi Province. Convenient transportation, abundant coal and power resources, fast communication and superior environment. Mainly produce flanges and forgings of various specifications. Application in piping installation, pressure vessel, equipment accessories.

Why Choose Us

Our Service
With strong technical force, advanced production technology, perfect quality inspection, and reliable after-sales service, it provides a basis for supervision and cooperation for many customers at home and abroad.

Our Certificate
The company Excellent Supplier of 2019 Safety production standardization certificate Quality management system certification.

Production Market
The products are mainly exported. It is exported to Europe, America and other countries and regions. The product quality is good, and the service is attentive. It is deeply appreciated and trusted by customers and users at home and abroad, and has won a high reputation. They have become one of the largest flange and forging suppliers in China.

Our Factory
Shanxi Hongkai Forging Co., Ltd. is located in China Energy Heavy Chemical Industry Base. Dingxiang County, the hometown of forging in Shanxi Province. Convenient transportation, abundant coal and power resources, fast communication and superior environment.

Benefits of Lap Joint Flanges

Easy Alignment and Installation:

One of the key advantages of lap joint flanges is their ability to facilitate easy alignment during installation. The lap joint design allows for rotational adjustments, making it convenient to align the bolt holes accurately.

Flexibility and Misalignment Compensation:

Lap Joint Flanges are highly flexible, allowing for slight axial and angular misalignment between the connected pipes. This flexibility helps absorb vibrations, thermal expansion, and contraction, reducing stress on the system.

Cost-Effective Solution:

Lap Joint Flanges are often more cost-effective compared to other flange types.

Lower Stress Concentration:

The loose fit between the flange ring and stub end in a lap joint flange helps distribute the bolt load over a larger area, reducing stress concentration at the joint.

Versatility in Material Selection:

Lap Joint Flanges can be manufactured using various materials such as Stainless Steel, Carbon Steel, Alloy Steel, Low-Temperature Carbon Steel, High Yield Carbon Steel, High Nickel Alloy, Monel, Hastelloy, Nickel, Alloy 20, Inconel, and Titanium.

Lap Joint Flanges Standard Specifications

Product Name	Lap Joint Flanges \| Loose Flange \| LJ / LJFF / LJRF Flange
Size Range	1/2″ (15 NB) to 48″ (1200NB)
Class / Pressure Rating	150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Standards / Dimensions	ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, BS, GOST, MSS SP-44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605
Flange Face Types / Connection Type	Flat Face Flange (FF), Raised Face Flange (RF), Ring Joint Flange (RTJ), Lap Joint Flange, Male and Female Flange (M&F), Large and Small Tongue-and-Groove Flange (T&G)
Dimensions	ANSI B16.5, ANSI B16.47 Series A & B, ASA, API-605, MSS SP44, AWWA, Custom Drawings
Custom Design	As per your drawing \| AS, BS, ANSI, DIN, JIS \| Equal and Reducing Configurations
Material Test Certificates (MTC)	As per EN 10204 3.2 and EN 10204 3.1, Test Certificates certifying NACE MR0175, NACE MR0103
Test Certificates	100% Radiography Test Report, EN 10204/3.1B, Raw Materials Certificate, Third Party Inspection Report, etc
Tests	Hydrostatic testing machine, Direct-reading Spectrograph, UI trasonic flaw detector, X-ray detector, Magnetic particle detector
Equipment / Machines	Press machine, Pushing Machine, Bending machine, Sand-blasting machine, electric bevelling machine, etc.
Coating	Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized
Origin	Indian / USA / Japan / West Europe / Korean
Applications/Usage	Offshore, Oil Field, Shipbuilding, Water System, Natural Gas, Pipe Projects, Electric Power, etc.

Applications of Lap Joint Flanges

Chemical processing industry

Lap joint flanges are made with corrosion-resistant material, which can reduce costs in the chemical industry. Also, their design makes them less prone to come in contact with fluids and gas passing through the pipes.

Oil and Gas industry

In the oil and gas industry, pipelines and equipment often require frequent maintenance and inspections. So, lap joint flanges are ideal is such scenarios. They allow for easy and quick assembly and disassembly.

Water treatment plants

Water treatment plants often require modifications and expansions as they upgrade their capacity. Lap joint flanges allow easy alignments and adjustments.

Food and beverage industry

Hygiene is the top priority in the food and beverage industry. Lap joint flanges are easy to disassemble and clean. It allows companies to save time on cleaning and helps them improve production.

Pharmaceutical industry

Piping systems in the pharmaceutical industry require an environment free from contamination. Lap joint flange enables companies to frequently clean pipes.

Lap Joint Flanges Standards

ANSI/ASME B16.47 Flanges	ANSI/ASME B16.36 Flanges	ANSI/ASME B16.5 Flanges	Pr. EN1902-1 Flanges
DIN Flanges	JIS Flanges	BS 4504 Flanges	BS 10 Flanges
MSS SP-44 Flanges	JIS B2220 Flanges	KS B1503 Flanges	UNI Flanges
SABS/SANS 1123 Flanges	AS 2129, AS 4087 Flanges	ISO 9624, ISO 7005-1 Flanges	AWWA Flanges Standard
GOST Standard Flanges	API Flanges	AS/ANZ 4331.1 Flanges	Series A Flange
Series B Flange	SAE J518 Flanges	GB Flange	Norwegian Standard Flanges

FAQ

Q: What is a Lap Joint Flange?

A: A Lap Joint Flange is a type of flange that features a flat face with a raised hub, designed to be used with a lap joint stub end for easy assembly and disassembly of piping systems.

Q: What industries are Lap Joint Flanges commonly used in?

A: Lap Joint Flanges are widely used in various industries, including oil and gas, chemical processing, food and beverage, and industrial manufacturing, where frequent maintenance or system modifications are required.

Q: What are the advantages of using Lap Joint Flanges?

A: Lap Joint Flanges offer several advantages, such as easy installation and removal, flexibility in alignment, and the ability to connect dissimilar metals, making them suitable for applications that require frequent maintenance or system changes.

Q: What materials are available for Lap Joint Flanges?

A: We manufacture Lap Joint Flanges in a range of materials, including carbon steel, stainless steel, duplex steel, and other alloys, to suit different application requirements and environmental conditions.

Q: Can you manufacture Lap Joint Flanges in custom sizes?

A: Yes, as a custom specialty flange manufacturer, we can produce Lap Joint Flanges in custom sizes to fit your specific piping or equipment dimensions.

Q: What pressure ratings are available for Lap Joint Flanges?

A: We offer Lap Joint Flanges in a wide range of pressure ratings, from ASME Class 150 to Class 2500, and API 2000 to 10000, to accommodate various application needs and process conditions.

We're well-known as one of the leading lap joint flanges manufacturers and suppliers in China. If you're going to wholesale high quality lap joint flanges with competitive price, welcome to get more information from our factory. Also, customized service is available.

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