ASME B16.5 Gr2 Titanium Necked Butt Welding Flanges (WNRF)| Bright surface finishing·special for high pressure pipeline

Published by Engineering Team, Shaanxi Qianyi Tuoda Technology Co., Ltd on 2026-09-22

The failure of high pressure pipeline system often occurs not in the pipeline itself, but in the flange welding joint position.stress concentration, weld interlayer, Rough sealing surface, surface oxidation pollution, will be under high pressure., heterotherm, Step by step amplification under corrosion conditions, cause leakage, cracking, Unplanned downtime.
technical specifications
core advantages
1. Tapered neck pressure relief structure to prevent weld stress cracking
2. Full body bright finish machining, excellent welding performance
3. Lightweight and high strength, reducing overall pipeline load
4. Forging refines grain size and improves stability
5. Multi-material complete supply
typical application scenarios

• High pressure chemical corrosion pipeline: organic acid, chloride, salt corrosion medium transmission system

• Offshore oil and gas platform: salt fog, high humidity, high pressure fluctuation pipeline connection position

• Pressure vessel, heat exchanger, reaction kettle high pressure pipe, equipment manhole flange

• Low temperature process system, industrial pipeline equipment with frequent cold and hot alternation

supply capacity

• MOQ: 100KG, supporting bulk engineering orders

• Delivery method: T/T, L/C, D/P, D/A international trade settlement can be supported

• Packing: Solid wood export cases, shockproof and moistureproof, suitable for sea and land transportation

• Customization: support non-standard size, special pressure grade, special end face, drawing customization processing

common problem
Consulting and Quotation

ASME B16.5 Gr2 titanium neck butt welding flange (WNRF) produced by our factory, Designed for high pressure, high temperature, Rigorous pipeline design with large temperature fluctuations.Unique long tapered neck structure can effectively disperse weld stress and strengthen pipeline joint strength;CNC bright finish machining technology is adopted as a whole, Clean and smooth surface, scale free, No machining burrs, High quality TIG can be performed directly upon arrival, plasma welding, Significantly reduce the defect rate of field construction.

Multi-grade titanium and nickel-base alloy customization, Widely adapted to chemical strong corrosion, offshore oil and gas, sea water desalination, Low temperature process and other high-end conditions, Lightweight, High strength and long-term corrosion resistance.

Project: Implementation standards Parameters: ASME B16.5, ASME B16.9, JIS, EN

Item: Material designation Parameters: Gr1, Gr2, Gr5 (Ti-6Al-4V), Gr7, Gr12

Item: Matching alloy Parameters: N200/201, N6, Inconel 600, Monel 400, Hastelloy C-276

Item: Product type Parameters: WN neck butt welding, thread, blind plate, socket welding, loose sleeve

Item: Sealing surface Parameters: RF salient surface, FF full plane

Item: size range Parameters: NPS 1/4"~24"(DN10~DN600)

Item: Pressure rating Parameters: Class150#~1200#, maximum support 2500#

Item: Operating temperature Parameters: -60℃~+250℃

Project: Surface technology Parameters: Precision CNC bright surface finishing

Item: Processing method Parameters: forging, rolling, precision turning, polishing

Project: Quality Testing Parameters: UT ultrasound, PT penetration, full size retest

Item: Factory packaging Parameter: Export solid wood box

Project: Origin Parameter: China·Baoji (Titanium Valley of China)

Project: Certification System Parameter: ISO9001

Long tapered transition structure allows uniform stress release, Avoid stress concentration at weld root, Significantly improve pipeline fatigue resistance, Especially suitable for frequent start and stop, pressure surge, High-pressure system alternating hot and cold.

Fully machined gloss finish, No oxide layer on the surface, no oil, No tool marks, High flatness of sealing surface, tight assembly, Can be directly welded use, Eliminate on-site polishing, repair, Rust removal process.

Titanium density is much lower than stainless steel, Overall weight is about 45% lighter, At high altitude pipe gallery, offshore platform, Pressure vessel equipment can greatly reduce the support and equipment load, Increase system safety redundancy.

Improving Internal Structure by Forging Process, better ductility, Greater resistance to deformation, size strictly aligned with international standards, Flanges are interchangeable.EN10204 3.1 material sheet and nondestructive test report can be provided for each batch, and the quality can be traced.

Except for Titanium Flanges, One-stop matching pure nickel, Monel, hastelloy, Inconel and other special pipe fittings flange, Meet the unified material selection of high-end engineering projects, Harmonization of delivery standards.

Q: What are the advantages of WN flange with neck butt welding compared with plain welding flange?WN flange with taper neck reinforcement, More uniform stress on welds, anti-stress, antifatigue, the resistance to deformation is far bet than that of a slip-on flange, is a high pressure, high temperature, Preferred configuration of critical process lines.

Q: Do you support RF and FF sealing surfaces?A: Support.RF convex surface sealing strong, adapt to most industrial pipelines;FF full flat is suitable for use with cast iron equipment, low pressure valves and fragile flange joints.

Q: How does bright finish help welding?Bright surface without oxidation, inclusion-free, without skin, Can effectively avoid welding pores, slag inclusion, crack defect, Ensure weld forming quality and corrosion integrity.

Q: Can you provide material certification and inspection data?3.1 MTC Material Report attached to each batch, UT available on request, PT NDT Report, Factory Quality Inspection Records, The whole process is traceable.

If you need an accurate quote, Working condition selection, technical docking, non-standard custom, Material designation available, pressure rating, Specifications size, Sealing surface form and purchase quantity, We will provide you with professional technical solutions and detailed quotations within the specified time limit.

Contact: [15909236031] Response time: [1h]