How to Conduct Hydraulic Test for Metallic Expansion Joints?

2018-01-16 11:23:00
Nina
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Summary : Any tiny leak on the metallic bellows will cause extra maintenance costs, even cause dangerous accident and suspend piping operation. Henan Lanphan, as a experienced metallic bellows manufacturer, we always take hydraulic test seriously.

Hydraulic test is designed for leakage or deformation inspection of vessel equipments. By hydraulic test, we can find potential defects. Hydraulic test is an essential inspection item for metallic expansion joints , it use liquid medium (often water) to perform test.

Hydraulic test is a particular necessary procedure for the manufacturing process of metallic expansion joint s. Any tiny leak on the metallic bellows will cause extra maintenance costs, even cause dangerous accident and suspend piping operation. Henan Lanphan, as a experienced metallic bellows manufacturer, we always take hydraulic test on metallic bellows really seriously.

metallic bellows

metallic bellows

Each Lanphan metallic bellows is thoroughly hydro tested prior to delivery to ports. No matter simple type metallic bellows or complex tied universal metallic expansion joints, we treat equally. How to conduct hydraulic test for the metallic expansion joints? The procedures are as follows:

A: At first, filling the metallic expansion with clean water.

B: Slowly add pressure to liquid by using a hydraulic test pump, usually 1.5X the working pressure.

C: Hold the test pressure for about thirty minutes and observe.

D: External inspection should be conducted for leaks, squirm and instability. If you find any leakage, the metallic bellows should be repaired timely.

E: When finishing repair, check it for the second time as mentioned procedures.


Henan Lanphan believes high quality is the cornerstone for a company to rely on in market. Choosing Lanphan, we won’t let you down. For inquiry, please email to [email protected]

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