High pressure threaded flanges for oil and gas

As a dedicated High pressure threaded flanges for oil and gas suppliers, Longan Flange engineered this product line to solve the costly issue of pipeline downtime during emergency field repairs. Welded connections require lengthy x-ray clearance and specialized welding crews, which are difficult to coordinate on offshore platforms or remote field sites. This threaded solution allows rapid, flame-free installation while maintaining standard-compliant pressure containment.

Why Choose Longan Flange for Upstream Projects?

Field infrastructure requires components that withstand brutal environment-induced stresses without giving way to fatigue. Our High pressure threaded flanges for oil and gas floor manages the entire manufacturing cycle from raw forging to final machining, keeping critical dimensions standardized.

• Procurement Efficiency: Because this is a highly standardized item, our warehouse maintains raw and semi-finished stock, ensuring your procurement cycle is 50-70% faster than customized special-shaped parts.

• Interface Integrity: Dimensions such as aperture, flange thickness, and sealing surface are completely standardized to ensure that 99% of pipe fittings, valves, and valves are directly matched without special adapters.

What problems do these flanges solve on-site?

• Elimination of Hot Work Permits: Avoid dangerous field welding in live hydrocarbon processing zones.

• Rapid Turnarounds: Speeds up emergency pipeline repairs by utilizing a simple torque-tightening method.

• High-Pressure Security: The specialized triple-barrier sealing face safely contains media pressures up to 299 bar.

Material Specifications and Limits

• Standard Range: ASME B16.5, EN 1092-1, JIS B2220

• Pressure Capability: Class 150 (PN 20) to Class 2500 (PN 420)

• Maximum Sealing Threshold: 299 bar ultra-high pressure

• Certified Operating Range: -196°C up to +700°C

Overcoming Field Installation Challenges

Welding thick-walled high-pressure pipelines introduces localized heat-affected zones (HAZ) that are highly susceptible to hydrogen sulfide (H₂S) cracking. This mechanical thread connection completely avoids thermal stress generation. The High pressure threaded flanges for oil and gas design incorporates an ASME standard flange face + precision thread + reinforced neck anti-deformation triple sealing barrier design. This allows field crews to save 80% of installation time during frequent maintenance and emergency repair scenarios.

Packaging and Protection for Maritime Transit

Given the harsh marine environments these High pressure threaded flanges for oil and gas travel through to reach drilling sites, our packaging protocols are exceptionally rigorous:

• Heavy Flanges (Up to 4 meters): Enclosed securely in heavy-duty, reinforced wooden crates lined with moisture-barrier films.

• Thread Protection: Every internal thread is fitted with a heavy-duty composite plastic plug to prevent physical impact damage during handling.

• Surface Treatment: Coated with a clean, temporary rust-preventative oil that does not interfere with field assembly.

Quality Documentation and Compliance

We do not compromise on tracking and accountability. Each production lot is backed by a complete data package:

• Traceability: MTC/MTR reports provided according to EN 10204 3.1 / 3.2 or ASTM A961/A105.

• Physical Verification: 100% ultrasonic testing (UT) on raw forgings to ensure zero internal voids or inclusions.

Technical FAQ

Can these components be used directly in sour service (H₂S environments)?

Yes, provided the chosen base material meets NACE MR0175/ISO 15156 requirements. Because the High pressure threaded flanges for oil and gas avoid the heat-affected zones created by welding, they inherently lower the risk of sulfide stress cracking.

What mechanism prevents the flange from backing off under vibration?

The combination of the tapered thread interference fit and the preset bolt torque applied across the ASME standard flange face ensures the joint remains locked. For high-vibration areas near compressors, we recommend verifying the installation with our recommended torque settings.

How many times can this flange be dismantled and reassembled?

The robust design of the internal threads and the reinforced neck supports 3-5 times of reuse during routine piping inspections, provided the threads are cleaned and lubricated properly between cycles.