Quality Control

QC Hydraulics has a strictly quality control manufacturing system.Our products are manufactured in accordance with international standards. Such as DIN/EN, ISO, SAE, BS & JIS.Of course, QC Hydraulics has gained ISO 9001:2015 certification.

At QC Hydraulics, all dimensions, threads and tolerances are strictly in accordance with the approved drawings.The control of every article is rigorously enforced by our internal quality control department.

Material Supply

We focus on stainless steel material only, all of our fittings are stainless steel.

  • AISI 304(1.4301)

  • AISI 316L(1.4404)
  • AISI 316Ti(1.4571)
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The Key Control of Production Process

1.Technicians operate the first article according to the approved drawings.

2.Technicians inspect the first article and record. After inspected and approved, the first article will be put in the special box of first article, and wait for the workshop foreman recheck.

3. Workshop foreman proceed with the second inspection for the first article.

4. After the first article approved by technician and workshop foreman, and then start with mass production .

5. Inspection: All seal angles, small arc angles and diameters inspection by contracer, and all threads inspection by the right thread gages.

1.After the first article approved by technician and workshop foreman, and then start with mass production.

2.During mass production, the technicians inspect the threads every 10 pieces, and measure the dimensions every 15 pieces. Once any fittings of threads and dimensions failed to inspect, all this batch of fittings will be inspected completely to prevent any defective quality products.

3.The qualified fittings will be fitly put in a plastic box piece by piece.

4.Finally, the finished fittings will be transported to inspection department for final inspection.

1.Appearance: 100% inspection under strong light. No scratch, No burr.

2. Key sizes and angles: 15-20% randomly inspection by callipers and contracer. Once any sizes and angles of fittings failed to inspect or doesn’t respect to drawings, this batch of fittings forced to return back to production workshop to improve or make a new replacement.

3.Threads: 15-20% randomly inspection by right gages. Once any threads out of specs or doesn’t respect to drawings, this batch of fittings forced to return back to production workshop to improve or make a new replacement.

1.100% Parts water cleaning by ultrasonic (Add stainless steel cleaner to the water)

2.Parts surface can be passivated when clients have a request.


Packaging

  • Male or female fittings with plastic covers.

  • Several fittings packed in a small plastic bag to prevent scratch during transportation.

  • Packed in carton box with label.

  • Carton boxes put on a standard export plywood pallet with belt fasten.


Extra Service & After Service

We can laser engrave logo, part number and traceability number …on fittings as per clients’ requests.

When you find any poor quality fittings from QC Hydraulics, we guarantee we will 100% make a new replacement for free if you can provide the evidence of poor quality fittings.(Photos, Videos or original samples).

Please feel free to contact us if you have any inquiries

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