For raw materials

· Material control from raw materials. For raw material checking, we check 100% by chemical liquid. Any property mistakes would be rejected.

· Sand hole inspection after raw materials are machining before polishing.

· Carbon component report can be provided if needed

· Mechanics test report can be provided if needed

·
For New products

· 2nos of new samples to be checked against technical drawing. Testing report is provided to customers before bulk production.

·
For finished products

· For valves, pressure testing and temperature testing is required for each valve.

· After we get the finished products, we check for surface roughness, thickness equality, roundness, size measurement and sand holes again.

· For all finished products, the checking quantity is not less than 10% of total quantity.

· Before shipment, we check for the quantity of each product in order to find out any missing quantity or wrong product.

· Finally, we use strong package to prevent the products from any damages.

What machines we use to inspect the materials

To check the chemical	Stainless steel spectrometer
To check the surface roughness	Ra roughness instrument
To check the roundness	Vernier caliper
To check the thickness	Micrometer, Thickness gauge
To check the straightness	horizontal and vertical scale
To check the pressure	Pressure testing machine
To check the leaking	hydraulic pressure machine

We can also provide the following inspection if needed

To check the corrosion
To check the explosion

Joneng takes responsibility for the stainless steel valves and fittings provided by Joneng.

For the stainless steel parts, we take 3 years guarantee. For some special cases, customers need to declare for the detail application with Joneng before inquiries or orders. Like the chili production which is extremely in high alkaline; Like the extremely low temperature application, like -40C.

For the consumable parts ,like the gaskets, the caps, Joneng does not take responsible.

 +86-158-69600665 / +86-577-85319280
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