Titanium Heat Exchanger with EN 10204 3.1 MTC

Product Overview

Reviewed and maintained by the Engineering Team, Shaanxi Qianyi Tuoda Technology Co., Ltd.

Titanium Heat Exchanger with EN 10204 3.1 MTC | Heat-Number Traceable, ASTM B338/B265, ASME VIII + TEMA

Meta Description: Titanium shell-and-tube heat exchanger supplied with EN 10204 Type 3.1 MTC — ASTM B338 tube / B265 tubesheet, heat-number traceable from melt to tube tag to weld map, PMI per heat, eddy-current/hydro per B338 election, non-chlorinated PT on seal welds. 3.1 = material conformance; ASME VIII = fabrication; 3.2 TPI PO-fronted where required.

What EN 10204 3.1 Actually Certifies

A Type 3.1 MTC is not a generic "quality certificate". It is a heat-specific, inspection-specific test report issued by the manufacturer's independent inspection function (separate from production). For a titanium exchanger it must show:

• Grade + UNS (R50400 / R52400 / R56320 / R53400…)
• Standard: ASTM B338 (tube) / B265 (tubesheet/plate)
• Heat number — matching tube tag, bundle label, packing list
• Actual chemistry: Ti balance, O/N/H/C/Fe, plus Pd for Gr7, Mo-Ni for Gr12
• Mechanical results: tensile, yield, elongation (annealed values)
• Test method/election: ET or hydro per B338, flatten/flare or reverse-flatten
• Delivery condition: annealed, pickled/bright, dimensions/tolerances
• Independent QA signature (not the rolling operator)

3.1 proves the material supplied matches the grade on the PO. It does not, by itself, certify the weld or the ASME calculation — those are covered by the MDR and U-1A.

3.1 vs 3.2 vs ASME U-Stamp (stop confusing them)

Rule: 3.2 cannot be issued after fabrication — TPI must be named at PO stage. Asking for "3.2 later" is not a workflow.

Heat-Number Chain (the only real traceability)

Traceability is not a logo on the cert. It is a closed loop:

Melter heat record
   → Billet/flat product heat
   → Tube MTC (3.1) heat No.
   → Tube body stamp / laser tag
   → Bundle label + packing list
   → Weld map (tube heat × tubesheet heat)
   → As-built MDR dossier

Cut-to-length pieces carry the parent heat via transferred marking or controlled cut records — never a fresh "Gr2" sticker with no heat reference.

Gr7 Special Clause — Pd Must Be on the 3.1

• Gr7 = R52400, Pd 0.12–0.25% — if the 3.1 omits Pd, it does not prove Gr7
• Arrival PMI (OES/XRF) verifies Pd in the matrix; PMI supports, does not replace, full chemistry
• Weld filler ERTi-7 to keep HAZ corrosion performance consistent
• "Grade 7" printed on a tag without Pd chemistry = incomplete certification

Inspection Stack Delivered With the Unit

1. ASTM B338 tube MTC EN 10204 3.1 (heat-specific)
2. ASTM B265 tubesheet MTC 3.1 (solid or clad overlay)
3. Eddy-current or hydrostatic per B338 election (stated on PO)
4. PMI report per heat (XRF/OES)
5. PT on U-bends + tube-to-tubesheet seal welds (non-chlorinated penetrant)
6. Weld map + WPS/PQR (ASME IX)
7. ASME VIII calc package + TEMA data sheet + U-1A (coded units)
8. Hydro test record; helium leak option for critical duty
9. 3.2 TPI witness record when PO-fronted (SGS/BV/TÜV/DNV)

What 3.1 Does NOT Do (no overclaim)

• Does not choose the grade for your process — PO must state service chemistry
• Does not certify the weld — that is WPS/PQR + PT/leak test + AI review
• Does not equal ASME stamp — separate document chain
• Does not retroactively become 3.2 — TPI must witness before/during production
• Does not cover HF/fluoride service — titanium excluded, separate alloy review

Procurement Red Flags (reject quietly, before PO)

• MTC says "Grade 2" but no heat number → reject
• Heat number on tube ≠ heat number on cert → stop
• Gr7 cert without Pd value → not provable Gr7
• Only PDF cert, no weld map, no PMI → audit will fail
• "3.2 available after shipment" → not how EN 10204 works
• Chlorinated PT penetrant on titanium → crevice risk planted at QA stage

RFQ / Doc-Requirement Template (copy-paste)

Tube: ASTM B338 Gr___, OD×wall ___, heat-number tag required Y/N
Tubesheet: B265 Gr___, solid / clad (__mm Ti)
Cert: EN 10204 3.1 (default) / 3.2 TPI (SGS/BV/TÜV ___, named at PO)
MTC fields required: heat No., Pd (Gr7), O/N/H/C/Fe, tensile, ET/hydro election
PMI: per heat, XRF/OES, report attached Y/N
Cut pieces: transferred heat marking / cut-record map ___
NDE: ET ___ / hydro ___ / PT(non-Cl) ___ / helium (__ mbar·L/s)
Code docs: ASME VIII calc + TEMA sheet + U-1A + weld map ___
Packaging: seaworthy, Ti segregated from CS, cert in waterproof pocket ___

FAQ — Titanium Exchanger + EN 10204 3.1

Q1: Is 3.1 enough for EPC desalination/chemical projects?
A: Yes — 3.1 with heat-number closure + PMI is the standard acceptance baseline. 3.2 is added only when the owner/PO mandates TPI witness.

Q2: Can cut-to-length tubes keep 3.1 traceability?
A: Yes, via transferred marking or controlled cut records linking sub-pieces to the parent heat. No heat number = no real 3.1.

Q3: Does 3.1 prove the exchanger is ASME-compliant?
A: No. 3.1 proves material; ASME VIII/U-1A proves design+fabrication. Both ships in the MDR, but they are different documents.

Q4: How do I verify Gr7 from Gr2 by paper?
A: Pd 0.12–0.25% on the 3.1 chemistry line + PMI on arrival. No Pd line = not a verifiable Gr7 cert.

Q5: PMI or 3.1 — which is stronger?
A: 3.1 is the primary conformance record (lab chemistry). PMI is field verification. Use both; PMI does not replace lab analysis for low-level Pd.

Q6: Can you issue 3.2 after fabrication?
A: No. EN 10204 3.2 requires TPI involvement during the inspection window. Name the TPI at PO; witness points are planned, not backdated.

Q7: What about welded vs seamless tube certification?
A: Both carry B338 + 3.1. Welded tube adds reverse-flatten/seam NDE; election stated on PO, not assumed.

Q8: Packaging for export?
A: Ti segregated from carbon steel, ferroxyl-free surface, cert in waterproof pocket, ISPM-15 timber, heat/lot cross-linked to packing list.

Q9: Biggest audit failure mode?
A: Cert looks fine, but heat number on tube tag ≠ heat number on MTC. Closed-loop traceability is what auditors actually check.

Request a Document-Compliant Quote

Email: sales@[yourdomain].com

Send tube spec + service chemistry + cert level (3.1 / 3.2 TPI) + code level. We return a document scope list with the quote — not certs "to follow later".

About: Baoji titanium exchanger documentation desk — ASTM B338 tube / B265 tubesheet shell-and-tube units and replacement bundles with EN 10204 Type 3.1 MTC as default. Heat number closed from melt → tube tag → weld map → as-built MDR. PMI per heat, non-chlorinated PT, roll+seal-weld joints, ASME VIII + TEMA. Gr7 MTC declares Pd 0.12–0.25%; 3.2 TPI PO-fronted, never back-issued. Certificate chain delivered with the unit, not negotiated after.