Lap Joint Flange

Shanxi Sinomach Co., Ltd.：Your Leading Lap Joint Flange Supplier

Shanxi Sinomach Co., Ltd. is an industrial international supplier focusing on the design, production and sales of flanges, valves and other pipe fittings.

Since its establishment, the company has always adhered to the business principles of customer-oriented and honest business, with the purpose of meeting customer needs, and providing customers with all-round solutions and high-quality products. This makes our company a long-term partner trusted by many international customers.

ANSI Lap Joint Flange
$ 200.00

Lap joint flanges are one such flange type popular in both piping and duct system design.

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DIN Lap Joint Flange

DIN GB EN BS JIS lap joint flanges are one such flange type popular in both piping and duct system

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Why choose us?

Our Factory

Factory covers an area of 24,500 m2 and has many professional and technical personnel, annual production capacity more than 20,000 tons/year

Our Service

Whether it is pre-sales consultation, sales, or after-sales, we will answer customers' questions 24 hours a day and provide fast and effective solutions until customers are satisfied.

Our Equipment

Our there are 7 sets of forging equipment and 10 sets of heating equipment,the product quality is safe and reliable, reaching the international standard.

Product Application

Our wind power tower flanges, pressure vessel flanges, and petrochemical flanges are used in water conservancy, oil, natural gas and other pipelines.

Types of Lap Joint Flanges

Ring Type Joint Lap Joint Flanges (RTJLJF)

Ring type joint lap joint flanges refer to those that feature machined groove(s) on their surface meant to accommodate metal ring gasket(s). The metallic ring gasket inserted between two such faces results into an extremely high-pressure seal which can resist both high temperatures and pressures.

Flat face lap joint flanges (FFLJF)

Flat face lap joint flanges have no protrusions or surface areas that stick out; They have smooth, flat surfaces which are best suitable for full-face gaskets in case the mating fflange or equipment has this arrangement.

Raised face lap joint flanges (RFLJF)

Raised face lap joint flanges are made to have a small portion of raised surface around the hole on the flange faces. This aids in centering of gasket and improved sealing performance due to increased compression during bolt tightening.

Tongue and groove lap joint flanges (TGLJF)

One of these faces has an integral tongue-like chunk sticking out while the other one has a corresponding groove. The protrusion slots into the depression when joined together thereby enhancing alignment as well as stability within it.

Van stone lap joint flanges (VSLJF)

Van Stone lap joints consist of two parts-a loose van stone ring around a stub end which is joined by lap joint. When the piece is being assembled, the van stone ring will then rotate on its own around the stub end providing ease in installation and alignment.

Advantages of Lap Joint Flange

Variety of materials

Lap joint flanges come in materials like steel, brass, and stainless steel, so you can pick the best one for your piping system.

Strong and durable

Lap joint flanges are tough and can handle high pressure and weight, making them a great choice if you don’t plan to take them apart.

Easy to install

Installing a lap joint flange is simple. You just need a few screws to get the job done.

Great design

These flanges are user-friendly, easy to install, and maintain. They can also be customized for different piping needs.

Applications of Lap Joint Flanges

Chemical processing industry
In the chemical processing industry, workers must deal with caustic materials, various pressures, and periodic system maintenance. Due to its simplicity in disassembling, Lap Joint Flanges are especially well suited for this context. Lap Joint Flanges excel in chemical facilities where pipelines must be routinely maintained, checked, and repaired.

They make it possible to quickly disconnect parts, allowing for effective maintenance access without the need for a lot of welding. This benefit reduces downtime, improves safety, and supports keeping the chemical processes’ integrity.

Food and beverage industry
In the food and beverage business, upholding hygiene and avoiding contamination is crucial. Lap Joint Flanges are essential in maintaining the sterility and cleanliness of processing pipes. These flanges make disassembly simple and give access to vital parts for in-depth cleaning and sterilizing.

The flange design doesn’t have any cracks or small openings, so no food particles or germs can get trapped, adhering to the industry’s high hygiene regulations. Lap Joint Flanges help to produce safe and high-quality goods in a sector where customer protection is of utmost importance.

Water treatment facilities
Water treatment facilities require regular maintenance and repair to ensure the efficient treatment and distribution of water. Lap Joint Flanges offer an ideal solution, as they allow for quick access to critical components without disrupting the entire system. This feature significantly reduces downtime and helps maintain the continuous operation of water treatment processes.

Product Parameters

Standard	Nominal Diameter(mm)	Pressure Class (LB/MPa/kg/cm²)	Material
DIN	DN15-DN250	PN10, PN16, PN25, etc.	Carbon steel Stainless steel
GB/T 9112~9124-2010	DN15-DN3000	PN1.0, PN1.6, PN2.0, PN5.0, PN10.0, PN15.0, PN25.0, PN42	Carbon steel Stainless steel
EN 1092	DN15-DN3000	PN2.5; PN6; PN10; PN16; PN25; PN40; PN63; PN100; PN160	Carbon steel Stainless steel
BS 3293, 4504, 4505	DN15-DN3000	PN2.5; PN6; PN10; PN16; PN25; PN40; PN63; PN100; PN160	Carbon steel Stainless steel
JIS	DN15-DN500	5K, 10K, 16K, 20K	Carbon steel Stainless steel
Remarks: 1. For the details of DIN Lap Joint Flange that you need, you can contact us at any time to provide you the better solution; 2. We have the ability to produce non-standard flanges according to the drawings provided by customers, and can also provide drawings and calculations of flanges according to the design parameters of the flanges.

Package&Transport

We will implement the packaging materials and methods of the product in accordance with the terms of the contract signed with the customer, and choose the transportation method approved by the customer (such as sea freight, sea freight, etc.) according to the actual situation to ensure that the product reaches the customer safely and quickly.

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Other Services

Payment terms

30% deposit in advance, 70% balance before shipment.

Min.order

1 pkg.

FAQ

Q: What is the difference between a lap joint flange and a slip-on flange?

A: The difference between a lap joint flange and a slip-on flange lies in their design and functionality. A lap joint flange consists of two parts: a stub end, which is welded to the pipe, and a loose backing flange that can rotate freely around it.
In contrast, a slip-on flange is a single-piece component that slides over the pipe and is welded in place, providing a simpler and more cost-effective connection. Slip-on flanges are commonly used in low-pressure applications where frequent dismantling is not required.

Q: What is the difference between a swivel flange and a lap joint flange?

A: The difference between a swivel flange and a lap joint flange is that a swivel flange consists of two separate components: a rotating ring flange and a welded hub or collar that is attached to the pipe.
A lap joint flange also has two parts, but it uses a stub end rather than a welded hub, and its backing flange is loose rather than fully rotating like a swivel flange.

Q: What is the difference between lap joint flanges and van stone flanges?

A: The difference between lap joint flanges and Van Stone flanges lies in their manufacturing and sealing methods.

Q: When should I not use a lap joint flange?

A: Lap joint flanges are not recommended for high-pressure applications because the design does not provide the same strength or seal integrity as other flanges, such as welded or slip-on flanges, in high-pressure environments.
In applications where there is severe vibration or significant movement (such as in machinery or dynamic systems), lap joint flanges may not provide the necessary seal integrity or stability, as the loose flange may shift or loosen under intense vibration.

Q: How do I install a lap joint flange?

A: Weld the stub end (a part of the lap joint flange) securely onto the pipe using the appropriate welding method. Slip the loose flange over the stub end. The loose flange can rotate, allowing you to align it with the bolt holes on the other side of the pipe or flange.
Position the flange so that it fits over the stub end with the bolt holes properly aligned with the corresponding holes on the other flange.
Insert the bolts through the aligned holes of both flanges and tighten them evenly using the specified torque, ensuring a secure connection.

As one of the leading lap joint flange manufacturers and suppliers in China, we warmly welcome you to buy high-grade lap joint flange for sale here from our factory. All our are with high quality and competitive price. For more information, contact us now.

DIN Lap Joint Flange