Titanium pipe introduction 5 steps: from 0 to buyer, elbow + tee + size head + reducer once clear
Published by Engineering Team, Shaanxi Qianyi Tuoda Technology Co., Ltd on 2026-08-03
initial contacttitanium pipeParts, facing elbow, tee, size head, reducer is easy to confuse.Master the following 5 steps, from reading the map to placing an order in an hour.Depends on 12 yearsTitanium non-standard equipmentProject experience, collationtitanium pipeFive Steps to Beginner Procurement, Contains 4 types of pipe fittings, 5 major implementation standards, 4 kinds of media grade matching, 5 procurement avoidance points, astitanium pipeAt the beginning of the series, you can communicate with suppliers after reading it.
Core idea:titanium pipe5 Steps to Getting Started, Identify fitting types, Confirmation of performance standards, Matching grade according to medium, Verification of manufacturing processes, Evaluate procurement costs.Three minutes per step, one hour.titanium pipeBasic knowledge of component selection.
Step 1: Identify fitting type, Class 4titanium pipeDetails
titanium pipePieces are divided into four categories according to pipeline functions, and most engineering projects only use these four categories.
elbow, Divide into 90 °, 180° elbow, The effect is to change the direction of the pipeline, Suitable for all pipe steering positions
three links, It includes T shape and Y shape., For main branch and merge, Installed in pipe bifurcations, confluence position
Big and small head is also called reducer, Divided into two kinds of concentric and eccentric, Used to change nominal pipe diameter, Installed at pipe reducing position
Cap/CAP head, no through hole, for pipe end closure.
Simple memory formula: elbow change direction, tee to achieve shunt, size change pipe diameter, pipe cap plug pipe end.
Step 2: Confirm the implementation standard, distinguish between 5 types of standards, and select the wrong standard to install.
titanium pipeParts are divided into five standard systems according to the country and manufacturing process. If the standard is selected incorrectly, the size will not match, and the assembly cannot be carried out on site.
GB/T 12459-2017, applicable to seamless and welded pipe fittings, common for domestic projects;
GB/T 13401-2017, standard for plate welded pipe fittings, mostly used for large-diameter plate welded pipe fittings;
ASME B16.9-2018, factory prefabricated butt-welded fittings, export, foreign investment project selection;
ASME B16.28-2018, Special standard for elbows, mostly used for short radius elbows for export projects;
EN 10253-3:2008, European standard for pipe fittings, for EU export projects.
Step 3: Matching medium, titanium grade corresponding to Class 4 working conditions, wrong grade selection is high-frequency error
titanium pipeThe core basis of part brand selection is process medium, and most of the selection errors come from wrong brand selection.
Seawater, neutral brine containing chloride ions, TA2 is preferred to resist chloride ion pitting;
Wet chlorine, bromine-containing acetic acid such media, TA10, add molybdenum and nickel elements, crevice corrosion resistance;
Dilute sulfuric acid, dilute hydrochloric acid reduction acid medium, select TA9 containing palladium, improve reducing acid resistance;
Concentrated caustic soda medium with concentration of more than 30%, Titanium is not recommended, N6 pure nickel is recommended, Titanium material is easy to crack in concentrated alkali environment.
Step 4: Verify manufacturing process, 3 key indicators
Elbow bending radius R value priority ≥1.5D long radius elbow;Elbow with short radius R=1D stress concentration, easy to crack;
GTAW arc welding is adopted for welding, and stress relief annealing is carried out after welding at 550-600 DEG C for 1 - 2 hours;
The surface is passivated by acid pickling, HF:HNO =1:3, and a dense oxidation protective film is formed on the surface.
Step 5: Evaluate Purchase Price, 3 Key Points
Quotation not equal to total project cost, Elbow bending radius selection, short radius premium, Third-party testing costs, These hidden costs account for 20% to 40% of the total input
Manufacturing process directly affects price, Seamless pipe fittings cost the most, Next is welded pipe fittings, Plate welded fittings are the cheapest, The price difference of products of the same specification can reach 2-3 times
Compared with TA2, TA10 and TA9 are more expensive, 2~3 times more expensive than TA2.
5 Real Selection Cases
TA2 long radius elbow is selected for seawater desalination project, medium seawater is 25-40℃, DN300 R=1.5D 90° elbow, stable service for 8 years without pitting corrosion;
PTA unit selects TA10 T-shaped tee, medium contains bromoacetic acid at 120℃, DN200 T-shaped tee, 5 years service without crevice corrosion;
TA10 concentric head, wet chlorine 80℃, DN100 × DN80 concentric head, 6 years operation without corrosion;
TA9 Eccentric Reducer Used in Dilute Sulfuric Acid Working Condition of Chemical Plant, Medium 70℃ dilute sulfuric acid, DN150×DN100 eccentric head, 4 years without pitting
Caustic soda project selection error case, 50% NaOH 80℃ working condition selected R=1D short radius elbow, 3 to 6 months stress corrosion cracking.
5 Key Points to Avoid Purchasing Pit
1. bend radius shrinkage, Drawing requires R=1.5D long radius, Supplier changes R=1D short radius without permission, Cost reduction of 15%, But the stress concentration in the outer arc, Cracking within months
2. manufacturing process shrinkage, Drawings specify seamless elbows, Supplier quote by welded elbow, Price 40% lower, Check the manufacturing process mark on MTC material certificate during verification
3. No stress relief annealing after welding, elbow, High residual stress after tee welding, Require manufacturers to provide furnace temperature records for verification
4. insufficient wall thickness, Drawing requires wall thickness of 5mm, The actual supply is only 4mm, Ultrasonic thickness measurement or weighing comparison inspection can be used
5. concentric eccentric confusion, Concentric heads are supplied as eccentric heads, Confirm type clearly at drawing countersignature stage before purchasing.
Relying on Baoji China Titanium Valley Industrial Cluster, it can providetitanium pipeParts supporting technical services, One-to-one selection consultation included, provide a medium, temperature, pressure, pipeline specifications, Fast output selection schemeStanding TA2, TA10 elbow, tee, size of the first spot;Can assist in reviewing MTC material certificate and verifying the authenticity of materials.
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disclaimer, Text Structure Classification, standard clause, Process parameters are only used as reference for technical selection., The actual selection needs to be combined with the medium concentration, temperature, Comprehensive evaluation of field operation and maintenance conditions, The final proposal shall be subject to the written confirmation documents of both parties.