How to distinguish butt welding ring lap joint flange and slip on ring lap joint flange?

A few days ago,a customer asked me about how to distinguish butt welding ring lap joint flange and slip on ring lap joint flange.He wanted to order some products for his construction project.I sent samples of these products to him and also found some documents regarding the products.

What is butt welding ring lap joint flange?

Butt welding ring lap joint flange is movable flange,which is usually matched with water supply and drainage fittings.Each end of the expansion joint has a flange,which is directly connected by bolts with the pipeline and equipment in the project.(what is butt welding)

The purpose for using butt welding ring lap joint flange is to save material.Its structure is divided into two parts,the pipe end is connected with the pipe and the other end is made into butt welding rings.Flange plate can use low-grade materials,while pipes should use the same materials as pipes to save materials.

The advantages of butt welding ring lap joint flange are as follows:

1.Cost saving.When the pipe material is special and expensive,the cost of flange welding the same material is also high.

2.It is not easy to weld or process or needs high strength.Such as plastic pipes,glass steel tube and so on.

3.Easy to construct.It can prevent the changing of bolt holes of flanges when the equipment will be replaced in the future.

Disadvantages of butt welding ring lap joint flange:     

1.Low pressure.

2.Low strength at weld ring(especially when the thickness is less than 3mm)

What is slip on ring lap joint flange?

As for slip on ring lap joint flange,it is movable flange and directly connected by bolts with the pipeline and equipment in the project.It is generally used to save material.Its structure is divided into two parts.One end of the pipe is connected with pipeline, the other end is made as flanging.The plate part is set on the flanging.The plate can use low-grade material,while pipes can use with the same material as pipelines to achieve the purpose of saving material.

The advantages of slip on ring lap joint flange are as follows:

1.It is easy to weld or process or needs high strength.Such as plastic pipes,glass steel tube and so on.

2.Easy to construct.It can prevent the changing of bolt holes of flanges when the equipment will be replaced in the future.

3.Cost-saving when the price is high.

Disadvantages of slip on ring lap joint flange:

1.Low pressure.

2.Low strength at weld ring (especially when the thickness is less than 3mm).

Haihao High Pressure Flange & Pipe Fitting Group can produce different kinds of flanges,such as lap joint flange,slip on flange,weld neck flange with best quality and reasonable price.We can produce the flanges in different standards such as ISO,API,ANSI,BS,JIS,UNI etc and also in various materials,sizes and specifications.We can also accustomed our products according to customers’ requirements.Many word-famous clients have cooperation with our company,such as Shell,CNPC,SINOPEC,UNILEVER,Pemex,Hyandai and so on.Owing to our better service and good product quality,we have achieved a high praise form customers all over the world.

If you want to know more about our products,please feel free to contact us email:sales@haihaogroup.com