DELPHI FITTINGS
An ISO 9001 Certified Quality System You Can Audit
Our 5-step QC process and in-house testing lab ensure every hydraulic fitting, from raw material to final packaging, is fully compliant and traceable for our North American partners.
For a complete view of our factory-direct model, see our hydraulic fittings manufacturer in China page.
Our Philosophy: Control the Process, Control the Part.
At our factory, quality isn't a final inspection - it's the first thing we think about. We know the fittings we make are going into critical systems, and a single failure can cause downtime, repairs and reputational risk. We take that responsibility seriously. From incoming raw material checks through final packing, we document and control the processes performed at our facility and verify qualified external inputs where required.
We machine to the applicable SAE, DIN, BSP and JIC specifications defined for the order. Our process is designed to give OEMs and distributors measurable checkpoints they can review during supplier qualification.
The Paperwork to Back It Up
We are an ISO 9001:2015 certified factory. For us, that's the starting line, not the finish line. This certificate is the third-party proof that we have a serious, repeatable quality management system in place. It tells you we don't just wing it; we have documented processes for everything we do, a commitment to getting better, and a focus on making sure the part you get is the part you ordered.
When you're vetting a new supplier, this is the first thing you should ask for. It’s the baseline proof that you're dealing with a professional operation, not a fly-by-night outfit.
Our 5-Step Quality Gauntlet
This is the control plan applied to the fittings produced under our ISO 9001 quality system. It is how we find and correct issues before parts reach your loading dock.
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Step 1: Raw Material Inspection
We don't trust our steel suppliers' paperwork. Every batch of raw bar stock that comes in gets hit with our Spectrometer to verify its chemical makeup. If the steel isn't right, it doesn't even make it onto the rack.
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Step 2: In-Process CNC Checks
Our operators are constantly checking parts as they come off the CNCs. We use profilometers, digital calipers, and thread gauges right at the machine to make sure every dimension, thread, and surface finish is dead-on spec.
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Step 3: In-House Plating Control
We run our own standard zinc-plating line and control the chemistry and process in-house. Our default acceptance target is 120 hours before white corrosion and 200 hours before red corrosion in salt-spray testing. When an application requires longer protection, we can quote thicker zinc or zinc-nickel plating against an agreed test requirement.
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Step 4: Final Inspection
Finished parts get a final, rigorous shakedown. This includes 100% visual checks for any defects, thread gauge verification, and hardness testing. Nothing gets boxed until it passes.
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Step 5: Shipment & Packaging QC
The last step is to make sure the right parts get in the right box. We double-check every order for accuracy and inspect the packaging to ensure your fittings arrive in perfect shape, not rattling around loose.
Laboratory & Metrology: The Proof Behind the Part
Our in-house lab is the core of our ISO 9001:2015 quality system. It gives us the independent capability to verify every critical attribute—from raw material chemistry to final part cleanliness—ensuring every fitting we ship to our North American partners meets or exceeds the required specifications.
Material & Metallurgical Analysis
- Optical Emission Spectrometer (OES): Verifies alloy grade and elemental composition against certified standards.
- Copper-Alloy Spectrometer: Dedicated OES for precise analysis of brass and other copper alloys.
- Rockwell Hardness Tester: Measures material hardness to validate heat treatment and strength class.
- Vickers Hardness Tester: Provides precise hardness measurements on small parts, thin sections and localized test areas.
- Metallographic Microscope: Observes the material's microstructure and grain size to confirm proper forging and heat treatment.
- Metallographic Mounting Press & Polisher: Prepares metallurgical samples for microscopic analysis.
- Ultrasonic Flaw Detector: Supports nondestructive screening for internal discontinuities when the inspection plan requires it.
Dimensional & Surface Metrology
- Thread Ring & Plug Gages (GO / NO-GO): Guarantees that JIC, NPT, ORB, and other threads meet pitch diameter and form specs.
- Profile Projector / Optical Comparator: Provides non-contact measurement of complex 2D profiles and dimensions.
- Surface/Contour Profilometer: Assesses surface finish quality by measuring roughness, profile, and step height.
- Runout Tester / Concentricity Gauge: Confirms high-precision machining by measuring shaft runout and concentricity.
- Instant Vision Measurement System: Delivers rapid, automated, multi-dimension measurements, ideal for high-volume process checks.
Performance & Cleanliness Testing
- Salt Spray Test Chamber: Verifies our in-house standard zinc plating against the default 120-hour white-corrosion and 200-hour red-corrosion targets, and validates longer specified targets for upgraded thicker-zinc or zinc-nickel options.
- Cleanliness Analyzer (Particle Contamination Tester): Quantifies particulate contamination to meet stringent OEM cleanliness standards.
- Electric Thermostatic Drying Oven & Electronic Analytical Balance: Ensures precise and repeatable sample preparation for cleanliness and mass measurement tests.
Full traceability and documentation, including material certs, spectro-analysis reports, and hardness test results, are available with your shipments upon request to support your quality assurance programs.
This Is How We Build a Better Fitting.
This isn't just about passing an audit. This is about building a supply chain you can count on, backed by a process you can see. If you're tired of taking chances on quality, talk to the factory that doesn't.
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