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Quality & Certificates

Qualified to carry water, gas and mining duty

High-tech enterprise (2023) with 16 patents; potable-water hygiene licence and MA mining safety mark; full in-house testing from chemistry to hydrostatics.

Certificates & Recognitions

Every claim on this site has a paper behind it

Government recognitions and product certificates actually held — scan copies available with our quotation.

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High-Tech Enterprise Provincial recognition, 2023 · R&D in anti-corrosion & pipe forming
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Specialized & Sophisticated SME Provincial programme for focused, differentiated manufacturers
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Sci-tech SME · A-level taxpayer Innovation registration and tax credit rating, 2024
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Potable-water hygiene licence Hygiene licence for products involving drinking-water safety (since 2020)
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MA mining safety mark Mining product safety certification for dual-resistant coated pipe
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Coated-pipe test reports Hygiene safety evaluation · potable-water coated pipe · mining dual-resistant coated pipe
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16 patents Patents in anti-corrosion processes and large-diameter pipe forming
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Registered trademark Own brand registration for the Youchengkeji product line
Testing Capability

From chemistry to hydrostatics, all in-house

Purchased with the SAW lines and coating lines — not outsourced, so results come with the pipe, not weeks later.

NDT

X-ray inspection room

Weld-seam radiography on spiral and straight-seam pipes.

1000t

Hydrostatic testing machine

Pressure test up to 1000-tonne class holding per standard.

OES

Direct-reading spectrometer

Heat-by-heat chemical analysis of incoming coil and weld metal.

MT

Magnetic particle inspection

Surface and near-surface defect detection.

HRC

Digital Rockwell hardness tester

Hardness checks on base metal and coating systems.

DWTT

Drop-weight impact rig

Toughness verification for low-temperature duties.

UTS

Universal testing machine

Tensile and bend tests on base metal and welds.

LAB

Coatings laboratory

Magnetic thickness gauge, paint-film impact tester, spark leak detector, alcohol-lamp combustion box, motorized pressure pump.

QC Flow

Five gates from coil to dispatch

QC
Dimensional Check

Every pipe is measured before it leaves the yard

Diameter, wall thickness, length and ovality checked pipe by pipe against the order contract. Results are recorded and traceable back to the coil heat number.

Standards

Produced to national & industry standards

GB/T 3091-2015 GB/T 9711-2023 SY/T 5037-2023 Potable-water hygiene licence MA mining safety mark
SITE
On-site Acceptance

We follow the pipe to the trench

For key projects our engineers stay on site: arrival acceptance with the owner and supervisor, welding and joint-coating guidance, and after-sales follow-up until the line is commissioned.

Need certificate copies with your quotation? Standard practice.

Tell us which certificates your tender requires.

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