Titanium flange selection guide| 10 kinds of standards +7 kinds of sealing surfaces + true and false discrimination

Published by Engineering Team, Shaanxi Qianyi Tuoda Technology Co., Ltd on 2026-07-23

Selection of purchasing personnel of a domestic chemical enterpriseTitanium Flangesometimes encountered quotation chaos, the same specification products TA2, TA10 different suppliers price difference is obvious.Titanium flangeas chemical, petroleum, ocean, Vacuum salt making project key pipeline connector, Although it is not a high proportion in the whole equipment, But the brand, executive standard, sealing face, Structure selection error, Medium leakage is easy to occur, Bring about shutdown losses.Selection needs to be combined with working conditions, implementation standards, sealing forms, structural forms of comprehensive judgment.

TA2 and TA10 are commonly used in industrial projectsTitanium flange。TA2 corresponds to American standard Gr.2 industrial pure titanium, neutral, seawater, general chemical conditions high cost performance;TA10 is titanium molybdenum nickel alloy, addition of molybdenum, nickel alloy element, Greatly improved crevice corrosion resistance, Vacuum salt making, High temperature chlorine and other strong corrosive environment, The purchase cost will be significantly higher than TA2.Neutral working condition priority TA2;TA10 shall be selected for severe corrosion conditions with chloride and crack dead angle.

Titanium flangeIt has many sets of domestic and foreign implementation standards. HG and GB standards are widely used in domestic chemical and petrochemical projects.SH standard for petrochemical industry;Mechanical equipment reference JB;CB is selected for marine engineering.ANSI can be selected for export projects, BS International Standard, Selection must check the standard version, Avoid flange size not matching existing piping.

The sealing surface directly determines the sealing reliability, RF convex surface is common in the industry, Most common chemical scenarios can be usedRTJ ring connection surface is suitable for high temperature and high pressure working conditions;FM mortise surface is used for inflammable, explosive and toxic medium;FF full plane is mostly used for low voltage, and cast iron equipment pairing.In addition, there are special forms such as MFM concave and convex surface, TG trapezoidal groove surface, etc., which are selected according to medium danger level and pressure.

The structure is divided into flat welding, flat welding with neck, butt welding with neck, integral flange, socket welding, threaded flange, blind flange.Low pressure normal temperature pipeline plate type flat welding;medium pressure with neck flat welding;High temperature and high pressure important pipeline priority with neck butt welding;Threaded flanges cannot be welded;Blind flange is used for pipe inspection.Caliber DN65‑DN300 belongs to the cost-effective range, small-bore, Extra large diameter custom machining costs will increase.

Titanium flangeIt is difficult to distinguish the material from the appearance. Four points of verification shall be carried out when receiving the goods: the quotation is significantly lower than the market price and the vigilance shall be raised;Compared with the theoretical weight of the same specification, the weight deviation is too large to guard against wall thickness shrinkage;Ask for third-party material reports and check Mo, Ni and other key elements;Observe the pickling surface, the high quality product is uniform silver white, and the sealing surface has no knife marks and pits.Welding requires high purity argon protection, control of heat input, post-weld pickling passivation to restore corrosion resistance.

Based in Baoji China titanium valley manufacturers, can provide multi-brand, multi-standardTitanium flangeCustomized, engineers combined with medium, pressure, temperature to give selection recommendations.

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frequently asked questions

Q: TA2 and TA10Titanium flangeHow to choose? A: Seawater, general chemical neutral conditions TA2;Vacuum salt making, high temperature chlorine content, high crevice corrosion risk, TA10 is selected.

Q：Titanium flangeHow to choose the sealing surface? A: General chemical priority RF convex;High temperature and high pressure selection RTJ ring connection surface;FM mortise surface shall be selected for inflammable and explosive medium.

Q：Titanium flangeWhat are the key points of incoming material acceptance? Check the range of market quotations, Check theoretical weight, Check the third party material certificate, Visually inspect sealing surface and pickling surface quality.

disclaimer

This article selection ideas, Price range is based on industry project experience, For technical reference only, Not as engineering design, Direct basis for purchasing contract.Titanium material market fluctuations exist, the actual quotation to order the day the market prevail;The material selection of pressure flange shall be comprehensively evaluated by qualified engineers and technicians in combination with working conditions and national standards.