Asme B16 5 Long Weld Neck Flange

Asme B16 5 Long Weld Neck Flange

High-performance ASME B16.5 Long Weld Neck Flange solutions designed for vital pipe systems are produced by LINHUI Titanium. We provide precision-engineered flanges in carbon Asme B16 5 Long Weld Neck Flange (ASTM A105, A350 LF1/LF2/LF3, A694 F42-F70), alloy steel (ASTM A182 F1/F5a/F9/F11/F12/F22/F91, 16MnR, 12Cr1MoV), and stainless steel (ASTM A182 F304/304L/F316/316L, 321, 18-8). Our system quality satisfies TUV, ISO, and SGS requirements. Our ASME B16.5 Long Weld Neck Flange's tapered hub design eliminates turbulence in high-velocity applications while optimizing stress distribution for Class 150-2500 pressure ratings.

Key Features & Benefits

Compared to conventional designs, our Asme B16 5 Long Weld Neck Flange offer better stress distribution because to their longer hub lengths. In high-pressure applications, the progressive taper reduces stress concentration by 40% by strengthening the connecting point.

Erosion-corrosion hazards in high-velocity systems are eliminated thanks to smooth internal bore alignment. Full penetration welding is ensured by the butt-weld connection, providing joint integrity appropriate for thermal expansion and cyclic stress.

These flanges' improved fatigue resistance makes them perfect for vibration-prone settings like power plants and offshore platforms.

 Specifications 

For more specific product parameters, please refer to:

• Carbon Steel: ASTM A105, Q235, 16Mn...
• Alloy Steel: ASTM A182 F1, F5a...
• Stainless Steel: ASTM A182 F304, 304L...

Manufacturing Process

To improve mechanical qualities and optimize grain structure, we use precision forging at regulated temperatures. Using CNC technology, the expanded hub is machined with a tolerance of ±0.05mm to ensure excellent bore alignment.

Heat treatment procedures vary depending on the grade of the material; for example, solution annealing is used for stainless steel and normalizing is used for carbon steel. Dimensional verification is performed on each ASME B16.5 Long Weld Neck Flange using ASME B16.5 templates.

For corrosion resistance, surface finishing techniques include passivation and pickling. According to ASME B16.5 requirements, final machining guarantees face flatness within 0.002".

Inspection of Quality

Bolt hole spacing, flange thickness, and hub taper angles are confirmed by 100% dimensional inspection. While magnetic particle inspection (MPI) verifies surface integrity, ultrasonic testing (UT) finds interior flaws.

Every production lot's chemical composition is verified by Positive Material Identification (PMI). Leak-proof performance is ensured by hydrostatic testing at 1.5× design pressure.

On request, third-party examination is offered by SGS, TUV, BV, and DNV. ASME B16.5 compliance records, test reports, and material certificates are examples of complete documentation.

Applications Of Asme B16 5 Long Weld Neck Flange

High-pressure pipelines, offshore platforms, and refinery process lines that require exceptional fatigue resistance due to vibration and pressure cycling are examples of the oil and gas industry.

Chemical Processing: Managing corrosive media in reactor pipework, acid transfer systems, and chlor-alkali plants where leak avoidance is crucial.

Power generation includes heat exchangers, steam lines, and feedwater systems that run at high pressures and temperatures.

Desalination Plants: Long-term corrosion resistance is necessary for high-pressure RO systems and seawater intake piping.

Our Factory

Linhui operates a cutting-edge factory, leading in the titanium industry with a global reputation for excellence. Our commitment to quality and innovation ensures customers receive the best products and services.

Certifications

We are proud to hold numerous certifications:

• Manufacturing License of Special Equipment of China
• TUV Nord AD2000-W0, PED 2014/68/EU
• ISO 9001:2015 QMS Certificate, OHSAS 18001:2007, ISO 14001:2015
• Third-Party Inspections: DNV, BV, SGS, Moody’s, and more.

  

Export Markets

We have successfully sent ASME B16.5 Long Weld Neck Flange goods to more than 60 nations. North America (USA, Canada, Mexico), the Middle East (UAE, Saudi Arabia, Qatar), Southeast Asia (Singapore, Malaysia, Indonesia), and Europe (Germany, France, UK) are the main markets.

Major EPC contractors like CEFC, PTT, PDVSA, PETRONAS, and LUKOIL are served by our products. Across all continents, regional warehouses guarantee prompt delivery.

Why Choose Us

Direct Mill Pricing: Factory-direct supply ensures excellent traceability from raw material to final product while removing the need for middlemen.

Quick Response: 4 hours for quotes, 24 hours for drawing inspections, and 3–7 days for stock delivery. On request, rush orders are fulfilled.

Engineering Support: For your particular application needs, our in-house metallurgists offer advice on material selection and bespoke manufacturing.

Flexible MOQ: Trial orders accepted starting from 100 kg, supporting your prototype and testing needs before large-scale procurement.

Shipping & Packaging

Polyethylene film and anti-rust paper are used to individually wrap each flange. Fumigation-certified wooden cases guarantee damage-free overseas shipping.

Shipping choices include air freight for medium volumes (7–10 days), sea freight for big orders (25–35 days), and DHL and FedEx for urgent samples (3–5 days). Complete paperwork for customs clearance is included with every shipment.

FAQ

Q: What is the long weld neck flanges' maximum pressure rating?

A: Depending on the material and temperature, we can produce up to ASME Class 2500 for sizes NPS 1/2" through 12" that can withstand pressures higher than 6,000 psi.

Q: Are material certificates available?

A: EN 10204 3.1 mill test certificates with complete chemical and mechanical test data, traceable by heat number, are sent with every order.

Q: How long does it take to get bespoke specifications?

A: Stock products take three to seven days to ship. Depending on the complexity and volume of the order, custom dimensions and non-standard materials take 25–40 days.

Q: Are you in favor of third-party inspection?

A: Definitely. At any level of production, we welcome inspections by SGS, BV, TUV, DNV, or your chosen agency.

Request a Quote 

Ready to source reliable Asme B16 5 Long Weld Neck Flange for your project? Contact our engineering team at linhui@lhtitanium.com with your specifications, quantity, and delivery requirements. We'll provide a detailed quotation within 4 hours, complete with technical recommendations tailored to your application..