Instrument and sensor hardware
Brackets, clamps, fixings and small machined parts for subsea instruments and sensors can be reviewed against the approved drawing, loads and interface materials.
Subsea
Custom titanium components for subsea requirements
Subsea parts are specification-driven. Pressure, loads, interfaces, cathodic protection, qualification, inspection and traceability may all be project-specific, so MetalPartSource treats each enquiry as an engineering-controlled RFQ and confirms what a supply route can and cannot cover before quotation.
Applications / 01
Subsea applications to review for titanium parts
These areas are starting points for engineering review. Any titanium part must meet the approved drawing, the project material specification and any required qualification.
Housings and connector parts
Drawing-based parts for housings, covers and connector interfaces need the sealing surfaces, threads, tolerances and any pressure duty defined by the equipment designer.
Pressure or load-critical items
Pressure-containing and load-critical parts are reviewed only when the governing specification, qualification requirements and release evidence are stated in full.
Engineering checks
Cathodic protection, interfaces and qualification
Grade 2 is our commercial sourcing focus; other grades are reviewed only when the drawing or specification calls for them, with the supplier route and its scope confirmed first. The checks below belong in the project specification. They do not replace a qualified design review.
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| Check | Why it matters | What to tell us |
|---|---|---|
| Cathodic protection and hydrogen | Titanium connected to a cathodically protected structure can take up hydrogen. Published work links the risk to alloy, potential, temperature and surface condition. | Whether the part is electrically connected to the CP system, the design potential and reference electrode, and any specified isolation or coating. |
| Galvanic contact | Titanium electrically coupled to carbon steel or aluminium in seawater can accelerate corrosion of the less noble metal. Any CP implications require review by the project's corrosion specialist. | Every mating material, relative exposed areas, any project-specified isolation and the applicable CP design. |
| Crevices and sealing faces | Tight crevices at seals, gaskets and under-head contact need review of temperature, chemistry and joint geometry, especially where a part sees warm fluid. | Seal and joint design, internal and external fluids, and operating temperature range. |
| Thread galling | Titanium threads can gall during assembly. Mating materials, surface condition and lubrication affect the joint. | Thread form, any specified coating or lubricant, and the approved installation procedure. |
Subsea release packages vary widely between projects. The table below lists the evidence areas to define before a quotation can be meaningful.
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| Evidence area | What to specify | Before commitment |
|---|---|---|
| Material certificate | Material standard, grade and certificate type: EN 10204 3.1 where applicable; state any project requirement for EN 10204 3.2 explicitly. | Confirm the certificate route and required validation, inspection and witnessing arrangements before order commitment. Third-party inspection alone does not establish a 3.2 certificate. |
| Qualification and testing | Any qualification, mechanical or corrosion testing, pressure testing or other examination required by the specification. | Testing is never assumed; scope, laboratory and acceptance criteria are agreed in writing. |
| Dimensional inspection | Critical dimensions, sealing surfaces, threads, sampling and report format. | Agree inspection coverage and how exceptions are resolved before release. |
| Traceability and marking | Heat or lot traceability, part marking method and packaging identification. | Confirm the link between delivered items and records, and any marking restrictions on critical surfaces. |
Technical background: TIMET corrosion resistance of titanium (PDF); Lunde, Nyborg & Wilhelmsen: hydrogen absorption of titanium under cathodic charging (PDF); AMPP TR21524-2023 on HSC-resistant materials with cathodic protection (standard listing); IOGP material certification guidelines (PDF).
For marine maintenance hardware, see marine and offshore applications. For grade selection, read the Grade 2 vs Grade 5 titanium fasteners guide.
Supply boundary
Civil-use sourcing scope
Our sourcing scope is civil-use external fixings and approved drawing-based small parts. Process-wetted pump and valve components, heat-exchanger tubes or plates, and reactor or agitator internals are outside our advertised supply scope. The actual part, destination, end user and end use must be reviewed before order acceptance; an external fastener is not automatically exempt from export controls.
Read our civil-use and export scope before preparing an enquiry.
Scope / 02
Subsea RFQ framework
Use this page to prepare the sourcing conversation. Material selection and final design suitability remain the responsibility of the qualified project team and applicable specification.
Controlled inputs
Provide the approved drawing, revision, material specification and project documentation list.
Critical features
Identify sealing surfaces, threads, interfaces, tolerances and any characteristics requiring dedicated inspection.
Service conditions
State water depth or pressure duty, internal and external fluids, temperature range and expected loads.
CP and interfaces
Say whether the part connects to a cathodically protected structure and list every mating material.
Qualification boundary
Testing or qualification is never assumed; it must be specified, reviewed and commercially agreed.
Release package
Material records, dimensional reports and third-party involvement are aligned to the agreed scope.
Working note
Start with one defined requirement
A drawing, BOM line or material specification with quantity, required date, destination and documentation needs is enough for an initial feasibility review. For subsea items, include the qualification and release requirements at the start, because they often decide whether a supply route is viable.
We work through the Baoji titanium supply chain and confirm the proposed supplier route, documentation and inspection scope before you commit. Availability, minimum quantity and delivery are stated in the quotation for each requirement. The release-document checklist helps define the evidence your project needs.
Buying questions
Questions for subsea titanium RFQs
Short answers for subsea equipment makers, integrators and project buyers preparing a titanium enquiry.
Can titanium parts be used on structures with cathodic protection?
Only after engineering review. Titanium electrically connected to a cathodically protected structure can absorb hydrogen, and the risk depends on alloy, potential, temperature and surface condition. The project team defines any isolation or coating. State the CP arrangement, design potential and reference electrode in the RFQ.
Which titanium grades are used for subsea parts?
The grade is set by the project specification and the equipment designer. Grade 2 is our commercial sourcing focus; other grades are reviewed only when the drawing or specification calls for them, and we confirm the supplier route and its scope before quotation.
Do you provide qualification testing for subsea components?
Testing is never assumed. Any qualification, mechanical, corrosion or pressure testing must be specified in the RFQ, reviewed for a viable route and agreed commercially before commitment, including the laboratory and acceptance criteria.
Which documents can be requested for a subsea order?
Material test certificates (EN 10204 3.1 where applicable), heat or lot traceability, dimensional reports and specified third-party inspection may be requested. If EN 10204 3.2 is required, state it in the RFQ: validation involves the manufacturer's inspection representative, independent of manufacturing, and either the purchaser's authorized inspection representative or an inspector designated by official regulations. Confirm the certificate route, inspection and witnessing arrangements before order commitment; third-party inspection alone does not establish a 3.2 certificate.
Use the custom titanium component page for a machined drawing-based part, or the titanium fastener sourcing page for specified hardware. Submit either requirement through the RFQ desk.
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