TeCarve / Verify the Two Dedicated Plants & Quality Control
Factory Verification & QC
Complete Factory Transparency: Verify The Dedicated Plants & Quality Systems
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Live Video Audits: Book scheduled 1-on-1 live HD video audits via Zoom, MS Teams, or WhatsApp to inspect production lines and testing facilities.
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Full Facility Inspection: Directly inspect raw material storage, cold drawing and welding lines, bright annealing furnaces, and live PMI testing demonstrations.
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Verifiable Credentials: EN 10204 3.1 MTC with every order. Exclusive export authorization letters from both plants are available for verification under NDA.
Not every "manufacturer" advertised online owns real production equipment. Before you commit to an order, you should be able to confirm who you're actually buying from, and see the testing that stands behind every tube. Here's exactly how to verify TeCarve, book a live video audit, and review the testing and inspection every shipment goes through.
Two Real, Registered Dedicated Plants
TeCarve Tech Co., Ltd. (Hangzhou, established 2025). TeCarve is a specialized Chinese stainless steel piping solutions provider and the exclusive factory-direct export channel for two dedicated manufacturing plants in Foshan (welded & decorative tubing) and Wenzhou (seamless & precision tubing).
Foshan PlantFoshan, Guangdong
Wenzhou PlantWenzhou, Zhejiang
Exclusive export authorization letters from both plants are available for verification under NDA. TeCarve is a specialized Chinese stainless steel piping solutions provider and the exclusive factory-direct export channel for two dedicated manufacturing plants in Foshan (welded & decorative tubing) and Wenzhou (seamless & precision tubing).
Certificates Held by the Two Dedicated Plants and Specialist Makers
Certificates below are held by the two dedicated plants. Plant legal names, addresses and certificate numbers are withheld on the public site; full copies are available for verification under NDA.
Foshan Plant — Welded & Clad Pipes
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Approval Certificate for Materials — Welded Pipes and Fittings
Standard:Bureau Veritas Rules on Materials and Welding for the Classification of Marine Units
Scope:
WELDED PIPES AND FITTINGS; Welded pipes in stainless steel grades 304/304L, 316/316L, UNS32205/S31803 and UNS32750.
Valid until:4 Jan 2029
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Environmental Management System Certificate
Authority:ZEC (Zhejiang Huanke Certification Center for Environment Co., Ltd.)
Standard & scope
Standard:GB/T24001-2016 idt ISO14001:2015
Scope:
Production and service of stainless steel (corrosion-resistant alloy, high-temperature alloy, etc.) welded pipes, high-corrosion-resistant clad pipes, and anti-corrosion processing on [...] (corrosion-resistant alloy, high-temperature alloy, etc.) seamless pipe, stainless steel (duplex pipe /super duplex pipe, corrosion-resistant alloy, high-temperature alloy, etc.) pipe fittings, flanges and prefabricated parts.
Valid until:6 Sep 2027
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Occupational Health and Safety Management System Certificate
Authority:ZEC (Zhejiang Huanke Certification Center for Environment Co., Ltd.)
Standard & scope
Standard:GB/T45001-2020 idt ISO45001:2018
Scope:
Occupational health and safety management activities related to production and service of stainless steel (corrosion-resistant alloy, high-temperature alloy, etc.) welded pipes, high-corrosion-resistant clad pipes, and anti-corrosion processing on [...] (corrosion-resistant alloy, high-temperature alloy, etc.) seamless pipe, stainless steel (duplex pipe /super duplex pipe, corrosion-resistant alloy, high-temperature alloy, etc.) pipe fittings, flanges and prefabricated parts.
Valid until:6 Sep 2027
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Qualification Test Record (QTR) — NORSOK M-650
Authority:TÜV SÜD Certification and Testing (China) Co., Ltd. Beijing Branch
Standard:Bureau Veritas Rules on Materials and Welding for the Classification of Marine Units
Scope:
Longitudinally welded pipes in austenitic stainless steel and austenitic-ferritic (duplex) steel.
Valid until:11 Oct 2030
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Recognition of Manufacturer — Pipe, Tube and Fittings
Authority:Bureau Veritas
Standard & scope
Standard:Bureau Veritas NR320
Scope:
Stainless steel pipe, tube and fittings including 304, 304L, 316, 316L, 321, 317 and 317L; solution heat treated; maximum dimensions listed on the certificate include 1016 × 40 mm and 762 × 26 mm.
Valid until:25 Jun 2028
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Certificate of Authority to Use the API Monogram — API 5LD
Authority:American Petroleum Institute (API)
Standard & scope
Standard:API Spec Q1 and API 5LD
Scope:
Manufacturer of clad steel pipe; processor of clad steel pipe. QMS exclusion: design and development.
Valid until:30 Dec 2026
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3-A Symbol Authorization — Metal Tubing (33-03)
Authority:3-A Sanitary Standards, Inc.
Standard & scope
Standard:3-A Sanitary Standard Number 33-03 (Metal Tubing)
Scope:
CIP models: seamless tube 1/4, 3/8 and 1/2 in (6.35–12.7 mm); welded tube 3/4 to 6 in (19.05–152.4 mm). Materials: Types 304, 304L, 316, 316L stainless steel.
Valid until:31 Dec 2026
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EAC Certificate of Conformity — TR CU 032/2013 (Pressure Equipment)
Authority:Eurasian Economic Union certification body (EAC)
Standard & scope
Standard:Technical Regulation of the Customs Union TR CU 032/2013 "On safety of equipment operating under excess pressure"
Scope:
Stainless steel welded pipes for pressure equipment, manufactured to ASTM A358, A312 (ASME SA 312), A790 (ASME SA 790), A928 (ASME SA 928), DIN EN 10217-7 and GB/T 12771-2019.
Valid until:24 Nov 2027
Foshan Plant — Pipe Fittings
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Approval Certificate for Materials — Seamless Pipes and Fittings
Standard:Bureau Veritas Rules on Materials and Welding for the Classification of Marine Units
Scope:
SEAMLESS PIPES AND FITTINGS; Austenitic and austenitic-ferritic seamless stainless-steel fittings (Elbow, Reducer, Tee up to OD 323.8 mm, WT 9.53 mm; Cap up to OD 508 mm, WT 9.53 mm; solution heat treated).
Valid until:4 Jan 2029
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Approval Certificate for Materials — Welded Fittings
Standard:Bureau Veritas Rules on Materials and Welding for the Classification of Marine Units
Scope:
WELDED PIPES AND FITTINGS; Austenitic and austenitic-ferritic stainless steel welded fittings (Elbow, Reducer, Tee up to OD 508 mm, WT 9.53 mm; solution heat treated).
Valid until:4 Jan 2029
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Quality management system for Manufacturer of Materials acc. to Directive 2014/68/EU
Authority:TÜV Rheinland (TÜV Rheinland Industrie Service GmbH, Notified Body 0035)
Standard & scope
Standard:QM System acc. to EN 764-5, Clause 4.2 and AD 2000-Merkblatt W0; Directive 2014/68/EU Annex I, point 4.3
Scope:
Manufacture of seamless tubes & pipes, welded tubes & pipes and pipe fittings, see annex 2 revision 4 from 2025-12-04.
Valid until:Dec 2028
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3-A Symbol Authorization — Sanitary Fittings (63-04)
Authority:3-A Sanitary Standards, Inc.
Standard & scope
Standard:3-A Sanitary Standard Number 63-04 (Sanitary Fittings)
Scope:
Listed models of weld, clamp, BPE, aseptic, I-Line and bevel seat fittings and inspection ports. Materials: 304, 304L, 316, 316L stainless steel.
Valid until:31 Dec 2026
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Drinking Water Hygiene Safety Product Permit — Stainless Steel Water Supply Fittings
Authority:Health Commission of Zhejiang Province
Standard & scope
Standard:Regulations on Hygiene Supervision of Drinking Water; Hygienic Safety Evaluation Standard for Drinking Water Distribution Equipment and Protective Materials (2001)
Scope:
Stainless steel pipe fittings for water supply, made from 06Cr19Ni10 (S30408) or 022Cr17Ni12Mo2 (S31603); for conveying drinking water at ambient temperature, max. pressure 1.6 MPa.
Valid until:19 Apr 2028
Wenzhou Plant — Seamless Pipes & Tubes
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Approval of Manufacturer Certificate
Authority:DNV
Standard & scope
Standard:DNV rules for classification - Ships, DNV-OS-B101 - Metallic materials, DNV class programme - DNV-CP-0252 Steel pipes and steel pipe fittings
Standard:Rules for the Manufacture, Testing and Certification of Materials
Scope:
Austenitic stainless steel pipes up to 610 mm OD and 40 mm wall thickness; duplex and superduplex stainless steel pipes up to 355.6 mm OD and 35.8 mm wall thickness; eddy current testing accepted in lieu of hydraulic testing
Valid until:7 Mar 2028
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Approval Certificate for Materials — Seamless Pipes and Fittings
Standard:Bureau Veritas Rules on Materials and Welding for the Classification of Marine Units
Scope:
SEAMLESS PIPES AND FITTINGS; Seamless pipes in Duplex and Austenitic stainless steel grades.
Valid until:12 Mar 2027
Shared by Both Plants
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Quality Management System Certificate
Authority:CQM (China Quality Mark Certification Group)
Standard & scope
Standard:GB/T 19001-2016 / ISO 9001:2015
Scope:
Design and manufacturing of metal material seamless pipes, welded pipes, pipe fittings, bends, flanges, forgings, pipe spools and piping components; Manufacturing of metal material lined and clad steel tubes/pipes, clad fittings and clad flanges; Design and manufacturing of metal welding consumables; Manufacturing of metal wires; Hot piercing and machining of metal materials; Pipeline anti-corrosion processing.
Valid until:30 Aug 2028
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Quality management system for Manufacturer of Materials acc. to Directive 2014/68/EU
Authority:TÜV Rheinland (TÜV Rheinland Industrie Service GmbH, Notified Body 0035)
Standard & scope
Standard:QM System acc. to EN 764-5, Clause 4.2 and AD 2000-Merkblatt W0; Directive 2014/68/EU Annex I, point 4.3
Standard:ASME Boiler and Pressure Vessel Code Section II, Part A/B; applicable ASME/ASTM material standard
Scope:
Headquarter: Manufacture of Cold Finished Seamless Stainless Steel Tubes; Manufacture of Welded Stainless Steel Tubes and Pipes; Butt-welding Pipe Fittings; Forged Flanges and Forged Fittings (Approved Material see annex to certificate). Annex lists ASTM A213/A213M & ASME SA213/SA213M (OD 6–127 mm, WT 0.5–12.7 mm) and ASTM A249/A249M & ASME SA249/SA249M.
Valid until:24 Oct 2028
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Environmental Management System Certification Certificate
Standard:GB/T 24001-2016 / ISO 14001:2015 standard
Scope:
ENVIRONMENTAL MANAGEMENT ACTIVITIES OF MANUFACTURE AND SERVICE OF STAINLESS STEEL SEAMLESS TUBES & PIPES; ENVIRONMENTAL MANAGEMENT ACTIVITIES OF MANUFACTURE AND SERVICE OF STAINLESS STEEL WELDED TUBES & PIPES AND PIPE FITTINGS.
Valid until:4 Nov 2027
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Occupational Health and Safety Management System Certification Certificate
Standard:GB/T 45001-2020 / ISO 45001:2018 standard
Scope:
OCCUPATIONAL HEALTH AND SAFETY MANAGEMENT ACTIVITIES OF MANUFACTURE AND SERVICE OF STAINLESS STEEL SEAMLESS TUBES & PIPES; OCCUPATIONAL HEALTH AND SAFETY MANAGEMENT ACTIVITIES OF MANUFACTURE AND SERVICE OF STAINLESS STEEL WELDED TUBES & PIPES AND PIPE FITTINGS.
Valid until:4 Nov 2027
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Certificate of Manufacturing Assessment
Authority:ABS (American Bureau of Shipping)
Standard & scope
Standard:ABS Rules, Guides, the associated Specifications and Standards
Pipe fittings, flanges, valves, pumps and instruments are sourced from qualified specialist makers and inspected by TeCarve before export. These certificates are held by those makers.
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PED Material Manufacturer Certificate — Flanges & Fittings
Production and sales of steel forged flanges and pressure pipe fittings within the scope of qualification.
Valid until:24 May 2028
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API Monogram Licence — API 6D
Authority:American Petroleum Institute (API)
Standard & scope
Standard:API Spec Q1 and API 6D
Scope:
Ball valves, check valves, gate valves.
Valid until:29 Mar 2027
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API Monogram Licence — API 600
Authority:American Petroleum Institute (API)
Standard & scope
Standard:API Spec Q1 and API 600
Scope:
Bolted bonnet steel gate valves.
Valid until:29 Mar 2027
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ISO 9001 Quality Management — Sanitary Valves & Pumps
Authority:China Quality Certification Centre (CQC)
Standard & scope
Standard:GB/T 19001-2016 / ISO 9001:2015
Scope:
Design and production of sanitary valves (butterfly, ball, check, diaphragm and seat valves), pumps (rotary lobe and centrifugal) and fittings.
Valid until:5 Oct 2029
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ASME Certificate of Authorization — UV
Authority:The American Society of Mechanical Engineers (ASME)
Standard & scope
Standard:ASME Boiler and Pressure Vessel Code
Scope:
Manufacture of pressure vessel pressure relief valves (does not cover welding, brazing or fusing).
Valid until:8 Aug 2029
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National Board “NB” Mark Authorization
Authority:The National Board of Boiler & Pressure Vessel Inspectors
Standard & scope
Standard:NB-501, National Board Certification of Pressure Relief Devices
Scope:
National Board certified pressure relief devices to the UV designator.
Valid until:8 Aug 2029
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PED Module D — Spring Loaded Safety Valve
Authority:TÜV AUSTRIA GmbH (notified body 0408)
Standard & scope
Standard:Pressure Equipment Directive 2014/68/EU, Annex III, Module D
Scope:
Spring loaded safety valve, type A22F-16P DN50, PED Category IV.
Valid until:16 Dec 2027
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Laboratory Accreditation — Safety Valve Maker
Authority:China National Accreditation Service for Conformity Assessment (CNAS)
Standard & scope
Standard:ISO/IEC 17025:2017
Scope:
Testing and calibration capability listed in the accreditation annex.
Valid until:29 Jun 2032
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ISO 9001 Quality Management — Safety & Metal Valves
Authority:BCC (a Kiwa company)
Standard & scope
Standard:GB/T 19001-2016 / ISO 9001:2015
Scope:
Design, production and sales of safety valves and pressure piping metal valves. ISO 14001 and ISO 45001 certificates with the same scope are also held.
No flights required. We offer a scheduled, one-on-one live video factory audit over Zoom, Microsoft Teams, or WhatsApp, at a time that works for you. A typical audit covers raw material storage, the two dedicated plants’ cold-drawing/piercing/welding production lines, the annealing heat-treatment workshop, a live PMI (Positive Material Identification) demonstration, and end-forming and packaging. Below are real photos from the Wenzhou plant's seamless-tube production line, the kind of equipment a video audit will show you in person.
Round billets heated in the walking-beam furnace ahead of hot piercingHot-pierced tube shell exiting the piercing millCold rolling (pilger) mill sizing the tube to final dimensions
Heat exchanger tubes additionally undergo 100% flattening, flaring/expansion, and bend testing (plus reverse flattening for welded tube), confirming the tube won't crack during tube-sheet expansion in the field. Intergranular corrosion testing (ASTM A262 Practice E or A, or GB/T 4334) is available on request for austenitic and duplex grades.
Third-Party Inspection, When You Need It
For buyers who require independent verification, we've worked with SGS, Bureau Veritas, TÜV Rheinland, and Intertek, most often on oil & gas and heat exchanger export orders to Europe and the Middle East. A typical third-party inspection covers pre-shipment inspection (PSI), dimensional and visual sampling, wall-thickness re-check, on-site witness of hydrostatic/NDT testing, and container seal supervision, with an inspection certificate issued for that specific order.
Material Test Certificates (MTC)
Every order ships with an EN 10204 3.1 mill test certificate as standard, issued by the producing facility's independent QC department and covering chemical composition and mechanical properties traceable to the production heat/lot.
For high-pressure, pressure-vessel, or specified engineering projects, an EN 10204 3.2 certificate is available on request: a customer-nominated third-party inspector witnesses sampling, mechanical testing, and non-destructive testing on-site, then co-signs the certificate alongside the facility's QC lead.
Commercial Terms
Standard Procurement & Trial Order Terms
Transparent commercial terms for standard tube orders, custom fabrication, and trial batches from the two dedicated plants.
Minimum Order Quantity (MOQ)
Standard stainless tubing from 100–300 kg. Capillary tubing from 100 pieces per size. Custom fabrication orders evaluated after technical drawing review.
Free Samples & Prototype Policy
Standard catalog specifications sampled free of charge within 48 hours (freight collect). Custom fabrication prototypes in 5–7 business days; sample fees 100% credited against volume orders.
Production & Delivery Lead Times
In-stock standard tubing ships in 7–10 days. Custom production orders completed in 10–25 days. Special-shaped tube custom samples in 7–15 days.
Certificates & Shipping Terms
EN 10204 3.1 MTC standard with every order. Third-party inspection (SGS, BV, TÜV) on request. Worldwide delivery under FOB, CIF, CFR, or DDP terms.
What Buyers Say
“I've received the goods and everything is fine. Thank you so much sir.”
— Tommy, Nigeria
“The goods already went to my customers. I am waiting for the next order from them.”
— Khalid, Indonesia
“I did not coordinate a third-party inspection this time — but I trust in your product.”
— Carmen, Chile
Frequently Asked Questions
Is TeCarve a trading company or a real manufacturer?
TeCarve Tech Co., Ltd. — TeCarve is a specialized Chinese stainless steel piping solutions provider and the exclusive factory-direct export channel for two dedicated manufacturing plants in Foshan (welded & decorative tubing) and Wenzhou (seamless & precision tubing).
Can I see the factory before I place an order?
Yes. Book a live video audit, or request the standard audit checklist and supporting documentation first.
Do you provide third-party inspection?
Yes, on request, through SGS, Bureau Veritas, TÜV Rheinland, or Intertek.
How does a live video factory audit work?
After booking a time slot, our technical manager connects with you via Zoom, Microsoft Teams, or WhatsApp video call. We guide you through the factory floor in real time, inspecting raw material storage, forming machinery, annealing furnaces, hydrostatic testing benches, and live PMI chemical testing demonstrations.
How do you prevent material mix-ups between grades like 304 and 316L?
The two dedicated plants verify incoming steel coil certificates from primary steel producers such as Tsingshan and TISCO. Optical emission spectrometry at the two dedicated plants verifies melt chemistry. Before dispatch, technicians perform PMI verification on every batch before shipment (piece-by-piece on request).
