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What are the Permissible Weld Leak Rate Limits for Industry Sectors

What are the Permissible Weld Leak Rate Limits for Industry Sectors

What are the Permissible Weld Leak Rate Limits for Industry Sectors

(OP)
I have just joined a company that manufactures instrumentation for measuring flow, pressure, temperature, level in the petrochemical, pharmaceutical, food processing and nuclear processing industries.

The sensors that are placed into the customer pipelines/tanks have a welded tip to which the sensor head/electronics is attached. Applications would include a wide range of fluids, powders and gasses at different pressures. The company normally perform a 100% helium fine leak test and have found that a new process/material does not perform as well as others. For this assembly we are considering setting a leak rate limit of 2 x 10-6 cc/sec but need to make sure this limit is OK.

I am familiar with the EN68000 Sealing Test spec, this compares different leak test methods. What publication/s give guidance on appropriate leak rate limits for different applications/industries.

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