Titanium Alloy Pipes

Titanium is a highly chemically stable metal with excellent corrosion resistance to most acids, alkalis, salts and other chemical media. At room temperature, titanium reacts with oxygen to form a dense oxide film on the surface, preventing further corrosion. Even in extreme environments such as high temperature, high pressure, and strong corrosion, titanium tubing can maintain a long service life.

 

Grade	UNS Designation	Nominal Composition	Key Characteristics	Primary Applications
Grade 5	R56400	Ti-6Al-4V	High strength, heat treatable	Aerospace, structural, high-pressure
Grade 7	R52400	Ti-0.15Pd	Superior corrosion resistance	Chemical processing, marine
Grade 9	R56320	Ti-3Al-2.5V	Medium strength, excellent formability	Hydraulic tubing, aerospace
Grade 23	R56407	Ti-6Al-4V ELI	High strength, enhanced toughness	Medical implants, cryogenic

 

Professional pure titanium pipe material supplier - GNEE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NPS	DN	OD[in (mm)]	Wall thickness[in (mm)]
			SCH 5	SCH 10s / 10	SCH 30	SCH 40s / 40 / STD	SCH 80s / 80 / XS	SCH 120	SCH 160	XXS
⅛	6	0.405 (10.29)	0.035 (0.889)	0.049 (1.245)	0.057 (1.448)	0.068 (1.727)	0.095 (2.413)	-	-	-
¼	8	0.540 (13.72)	0.049 (1.245)	0.065 (1.651)	0.073 (1.854)	0.088 (2.235)	0.119 (3.023)	-	-	-
⅜	10	0.675 (17.15)	0.049 (1.245)	0.065 (1.651)	0.073 (1.854)	0.091 (2.311)	0.126 (3.200)	-	-	-
½	15	0.840 (21.34)	0.065 (1.651)	0.083 (2.108)	0.095 (2.413)	0.109 (2.769)	0.147 (3.734)	-	0.188 (4.775)	0.294 (7.468)
¾	20	1.050 (26.67)	0.065 (1.651)	0.083 (2.108)	0.095 (2.413)	0.113 (2.870)	0.154 (3.912)	-	0.219 (5.563)	0.308 (7.823)
1	25	1.315 (33.40)	0.065 (1.651)	0.109 (2.769)	0.114 (2.896)	0.133 (3.378)	0.179 (4.547)	-	0.250 (6.350)	0.358 (9.093)
1¼	32	1.660 (42.16)	0.065 (1.651)	0.109 (2.769)	0.117 (2.972)	0.140 (3.556)	0.191 (4.851)	-	0.250 (6.350)	0.382 (9.703)
1½	40	1.900 (48.26)	0.065 (1.651)	0.109 (2.769)	0.125 (3.175)	0.145 (3.683)	0.200 (5.080)	-	0.281 (7.137)	0.400 (10.160)
2	50	2.375 (60.33)	0.065 (1.651)	0.109 (2.769)	0.125 (3.175)	0.154 (3.912)	0.218 (5.537)	0.250 (6.350)	0.343 (8.712)	0.436 (11.074)
2½	65	2.875 (73.03)	0.083 (2.108)	0.120 (3.048)	0.188 (4.775)	0.203 (5.156)	0.276 (7.010)	0.300 (7.620)	0.375 (9.525)	0.552 (14.021)
3	80	3.500 (88.90)	0.083 (2.108)	0.120 (3.048)	0.188 (4.775)	0.216 (5.486)	0.300 (7.620)	0.350 (8.890)	0.438 (11.125)	0.600 (15.240)
3½	90	4.000 (101.60)	0.083 (2.108)	0.120 (3.048)	0.188 (4.775)	0.226 (5.740)	0.318 (8.077)	-	-	0.636 (16.154)

 

Mechanical Properties Comparison

Grade	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Formability	Weldability
Grade 5	895	825	10	★★	★★★
Grade 7	345	275	20	★★★★★	★★★★★
Grade 9	620	480	15	★★★★	★★★★★
Grade 23	860	795	12	★★★	★★★

 

Corrosion Resistance Comparison

Environment	Grade 5	Grade 7	Grade 9	Grade 23
Seawater	Excellent	Excellent	Excellent	Excellent
Oxidizing Acids	Good	Excellent	Good	Good
Reducing Acids	Fair	Excellent	Fair	Fair
Chlorides	Excellent	Excellent	Excellent	Excellent
High Temperature	Excellent	Good	Good	Excellent

Cost Comparison

Factor	Grade 5	Grade 7	Grade 9	Grade 23
Raw Material Cost	Moderate	High	Moderate	Moderate-High
Fabrication Cost	Higher	Low	Moderate	Higher
Lifecycle Cost	Low	Very Low	Low	Low
Availability	Excellent	Good	Good	Good

 

Marine Industry
Chemical and petrochemical industry
Pulp and paper industry
Sporting goods - golf shafts, bicycle frames, etc.
Medical industry
Nuclear industry
Titanium is classified in two categories, commercially pure and alloys with additives such as aluminum and vanadium.

 

Our titanium alloy pipes are protected by a multi-layer export-grade packaging system designed to ensure they arrive in perfect condition. Each pipe is first individually protected with foam spacers or plastic end caps to prevent surface contact and damage, then securely bundled with steel strapping and edge protectors. The bundles are wrapped in a moisture barrier layer of VCI (Vapor Corrosion Inhibitor) paper and polyethylene film, with desiccant packs added for additional humidity control during sea freight. Finally, the pipes are securely packed in robust ISPM 15 compliant wooden crates or steel-framed pallets, clearly labeled with grade, specification, heat number, dimensions, and shipping marks for full traceability and safe handling during international transport.

GNEE Group has its own factory producing many different grades of titanium products. The factory has experienced workers, qualified and professional equipment, well-collaborated operations, and a business team with rising sales year-round. The company has been specializing in the titanium material field for more than 10 years, and we have earned a worldwide reputation for our fast delivery, competitive prices, and good after-sales service.

Q1: What is the difference between seamless and welded titanium pipes?

Seamless pipes are made from solid billet with no weld seam, offering maximum integrity for high-pressure or critical applications. Welded pipes are made from strip with a longitudinal weld, offering more economical production for larger diameters and longer lengths. Both types are acceptable under ASTM specifications when properly manufactured and inspected.

Q2: Can different titanium grades be welded together?

Yes, with appropriate filler metal selection:

Gr5 to Gr5: ERTi-5 filler

Gr5 to Gr9: ERTi-9 filler

Gr7 to Gr2: ERTi-7 or ERTi-2

Gr23 to Gr23: ERTi-5 ELI filler

Consult welding procedures for specific combinations.

Q3: What is the maximum pressure rating for titanium pipes?

Pressure ratings depend on grade, size, wall thickness, and temperature. Consult ASME B31.3 for process piping or specific design codes. As a guideline, Schedule 10S Grade 5 pipe can typically handle 2000-4000 psi depending on diameter.

Q4: Are these grades suitable for sour service (H₂S environments)?

Grade 5: Limited resistance, may require special considerations

Grade 7: Excellent resistance to sulfide stress cracking

Grade 9: Good resistance, often specified for sour service

Grade 23: Similar to Grade 5, with enhanced toughness

 

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