Socket Welded Titanium Flange for High-Pressure Piping Systems — Corrosion-Resistant, Custom-Engineered Solutions

A Socket Welded Titanium Flange is a high-integrity piping component built for small-bore systems (typically NPS 2 or smaller) operating under demanding pressure and corrosion conditions. It is made from ASTM B381 titanium grades including Grade 2, Grade 5 (Ti-6Al-4V) and Grade 7, and incorporates a recessed counterbore socket to enter the pipe and filet weld it on the outside. Designed to remove beveled pipe ends, minimize alignment and provide zero-leakage performance. Class 300, OD 180mm, polished finish, complete OEM capabilities. Baoji Huacan offers precision forged titanium flanges to fulfill your precise project specifications.

Parameter	Details
Material Grade	Grade 2, Grade 5 (Ti-6Al-4V), Grade 7, Grade 9, Grade 23; subject to application and specification
Material Standard	ASTM B381; other applicable ASTM / AMS specifications available upon request
Design Standard	Manufactured to customer drawings or agreed specifications; applicable flange standards to be confirmed per design
Size Range	Small-bore sizes, typically NPS 1/2–2; custom dimensions available
Pressure Rating	Designed to specified operating pressure and temperature; rating confirmed according to design requirements
Connection Type	Socket Weld; socket dimensions and bore configuration per drawing
Inspection & Certification	Material Test Certificate (MTC), EN 10204 Type 3.1 and Certificate of Conformity (CoC), as agreed

Self-healing corrosion resistance — TiO₂ film protects against seawater, chlorides, and oxidizing acids
High strength-to-weight ratio — Grade 5 exceeds 895 MPa tensile strength at ~4.51 g/cm³ density
Simplified fit-up — No beveling required; socket guides pipe for perfect pre-weld alignment
Fatigue-resistant seal — Single fillet weld outperforms slip-on double-weld designs under vibration
Multi-grade availability — Grade 2 for maximum ductility; Grade 5/7 for high-pressure and aggressive media
OEM/ODM ready — Custom dimensions, logos, and surface finishes available per drawing

Chemical Processing Equipment

Seawater Desalination Systems

Industrial Process Equipment

Offshore Oil & Gas — Used in subsea hydraulic control lines and chemical injection skids where Class 1500+ pressure meets aggressive seawater. The socket weld design resists vibration fatigue in small-bore lines on FPSO platforms.

Chlor-Alkali & Bleach Processing — Titanium eliminates the crevice corrosion that defeats stainless steel in wet chlorine gas and hypochlorite sampling lines, ensuring long-term process safety.

Seawater Reverse Osmosis (SWRO) — Deployed in high-pressure concentrate lines where concentrated brine, turbulence, and pitting risk demand a material that won't degrade over time for Socket Welded Titanium Flange.

Titanium spontaneously generates a self-healing TiO2 oxide on the surface. This means your flange is resistant to pitting, stress corrosion cracking and chloride attack without the need for any coating.

Grade 5 titanium (Ti-6Al-4V) has a tensile strength more than 895 MPa and a density of around 4.51 g/cm³. This is around 45% lighter than equal strength steel. This is a great benefit in offshore, aerospace and chemical plant installations.

The form of the socket also allows a natural pipe fixture, which ensures precise alignment before welding. Together with a filet weld seal, this forms a fatigue resistant, leak-proof joint that is suited for high vibration situations.

Every flange starts with verified raw titanium billets, sourced and checked via spectrometer analysis before entering production. Forging is performed using a 4,000-ton hydraulic press with precision die forging to achieve tight grain refinement and dimensional consistency.

CNC machining follows, using over 40 advanced lathes and machining centers to hold critical tolerances on the counterbore, hub, and face dimensions. The socket bore is machined to ASME B16.5 specifications, ensuring the correct expansion gap (~1.6mm) is maintained for weld cycle thermal relief.

Post-machining, surfaces are finished to your specified roughness — polished, natural titanium, or anodized — before final inspection and packaging.

Receiving Drawings

Annealing

Developing Machining Process

Finish Machining

Preparing Raw Materials

Deburring

Rough Machining

Deburring

Every titanium socket weld flange batch undergoes:

PMI via XRF — Confirms grade matches Material Test Report
Dimensional inspection — CMM and gauges verify ASME B16.5 counterbore and expansion gap
Dye Penetrant Testing (PT) — Per ASTM E165, detects surface porosity on flange face and socket bore
Ultrasonic Testing (UT) — Detects internal forging inclusions or bursts
Mechanical testing — Tensile and hardness data confirm forging integrity

Certifications

Baoji Huacan is ISO 9001 certified for quality management system from raw material verification to final shipping. MTC , EN10204 3.1 and COC documents provided as per requirement. Material traceability records.

Mechanical Properties Testing

Inner Diameter Measurement

Ultrasonic Testing

CMM Dimensional

Mounting Hole Diameter Measurement

Quality Management System Certification

Each flange is packed with vacuum bags and desiccants and unique foam inserts. We send bulk orders in heavy duty wooden containers. Complete labeling and documentation for simple tracking. Depending on the timescale you want, we may arrange delivery by air or sea.

Q: What expansion gap is required during installation?

A：A gap of ~1.6mm (1/16 inch) must be maintained at the socket bottom to allow thermal expansion during welding and prevent fillet weld cracking.

Q: Which NDT method applies to titanium socket weld flanges?

A：Dye Penetrant Inspection (PT) per ASTM E165 is the standard. Radiography is difficult on fillet welds; magnetic particle testing is not applicable to non-magnetic titanium.

Q: What is the risk if inert gas shielding is inadequate during welding?

A：Oxygen absorption above 427°C causes alpha case embrittlement, making the weld brittle and crack-prone. Argon shielding is mandatory; post-weld color inspection confirms proper shielding.

Q: Grade 2 or Grade 5 — which should I choose?

A：Grade 2 offers maximum corrosion resistance and ductility, ideal for chemical processing. Grade 5 provides tensile strength over 895 MPa for high-pressure offshore or aerospace applications.