Loose Flange manufacturer & supplier in China: easy to install and maintain.
Loose flange is also call lap joint flange. It has two types Butt Welded Loose Flange and Slip on Loose Flange. It is composed with two parts Flange and Stud end and its structure is simple which make loose flange is easy to install and maintain.
What is Loose Flange(Lap Joint Flange)?
Loose flange, also called lap joint flange, is a kind of flange that can be placed on the pipe end for movement. The flanging or steel ring is the sealing face, the function of the flange is to press them, but does not contact any medium. The loose flange is a key component for a wide range of industries, such as chemical, construction, water supply and drainage, light industry, stainless acid-resistant steel container connection and corrosion resistant pipeline.
The loose flange needs to be used with flat or butt welded rings. Firstly, inserting the loose flange into the pipe body, then welding the flat or butt welded ring with the pipe body. The part of the loose flange is in an active state, so it can be adjusted easily when docking with other flanges. However, the connecting way by flat or butt welded ring, resulting in the lower pressure rating, is generally used in low pressure pipelines.
There are many materials that can be used to make loose flanges, such as carbon steel ,stainless steel, alloy steel, etc. The choice of material depends on factors, such as pressure, temperature, and the nature of the fluid or gas being transported.
Applications
Loose flanges ( Lap Joint Flanges) are widely used for the pipeline connections of petroleum & gas, petrochemical, water engineering, ship building, seawater cleaning, construction etc.
Technical Specifications
Loose flange has many sizes no matter for carbon steel or stainless steel. The following information is just about their sizes and tolerances.
Loose Flanges type According to manufacturing technique
Loose Flange(Lap Joint Flange) materials
Alloy steel loose flange (lap joint flange)
Alloy steel loose flange has the advantages of good sealing performance, Short production cycle and wide application. The common materials refer to ASTM A182 F1、F5、F9、F11、F12、F22、F91, etc. This kind of loose flange is specially applied for high temperature and pressure pipelines.
Quality Assurance
1）According to the medium transported in the pipelines to choose the loose flange’s materials even if its materials are common and easy to get.
2）During the whole production QC persons are requested to check and inspect the dimensions of flanges to ensure they are matched with the sizes of pipelines.
3）To proceed the NDT inspection for the finished products to make sure the there are no defects and cracks.
4）The continuous improvement for the production process is an effective way to produce good quality and high precision products.