Classification by Manufacturing Method
1.1 Seamless Pipe and Tube
Seamless Gr.12 product is produced from forged and extruded hollows, cold-drawn or hot-finished to size. It offers a continuous grain structure with no weld seam, which is preferred for high-pressure piping, thick-wall applications, and exchanger tubes where weld-repair risk must be eliminated. Seamless tubing per ASTM B338 is the standard choice for shell-and-tube heat exchangers.
1.2 Welded Pipe and Tube
Welded Gr.12 product is formed from strip and seam-welded (GTAW or HF-ERW), then annealed and sized. It delivers the same corrosion performance when the weld is verified by flattening, flaring and non-destructive examination per B337/B338. For large-diameter process piping, welded pipe is the economical option, and welded tube is widely used in condensers with diameters up to about 219 mm.
Classification by Governing Standard
| Standard | Product | Typical Duty |
|---|---|---|
| ASTM B337 / ASME SB337 | Seamless and welded pipe | Process piping, pressure lines, fluid transport |
| ASTM B338 / ASME SB338 | Seamless and welded tubing | Condensers, heat exchangers, tube bundles |
| ASTM B861 / B862 | Seamless / welded tube (general service) | General corrosion-resisting tube applications |
Classification by Cross-Section and Form
Round pipe/tube - the standard section for pressure piping and tube bundles; sizes typically 6.0 mm to 219.1 mm OD, custom to 1219 mm for welded pipe.
Square and rectangular tube - used for structural and heat-transfer applications where a flat surface or compact nesting is required.
U-bend exchanger tube - supplied with bend radii and straight-leg lengths per the tube-sheet layout, commonly 12.7–38.1 mm OD with 0.889–2.108 mm walls.
Capillary and precision tube - small-diameter, tight-tolerance tube for instrumentation and sampling lines.
Application Selection by Industry
| Industry | Typical Equipment / Duty | Preferred Form |
|---|---|---|
| Oil & Gas | Offshore coolers, water-injection lines, topside piping | B337 welded pipe, B338 tube |
| Petrochemicals | Process piping, reboilers, condenser bundles | B338 seamless tube |
| Chemical plants | Heaters, evaporators, chloride-handling lines | B337 pipe, B338 tube |
| Power industry | Steam condenser tubing, cooling-water circuits | B338 tube |
| Desalination | Brine heaters, evaporator bundles | B338 tube (U-bend) |
| Pulp & paper | Bleach-plant heaters (chlorine dioxide service) | B338 tube |
| Food processing | Heat exchangers in corrosive cleaning service | B338 tube |
How to Specify Gr.12 Pipe and Tube Correctly
State the governing standard (B337 pipe or B338 tubing), grade 12, and UNS R53400.
Define OD, wall thickness or schedule, length, and straight vs. U-bend form.
Specify surface condition: pickled, polished, or bright annealed.
Agree test scope: hydrostatic, eddy current/ultrasonic, flattening, flaring, plus MTC per EN 10204 3.1/3.2.
Confirm packing and documentation (fumigation certificate, commercial invoice) for export shipment.
FAQ
What is the difference between Grade 12 pipe and Grade 12 tube?
In common usage, pipe is specified by nominal bore and schedule for fluid transport (ASTM B337), while tube is specified by exact OD and wall for heat-transfer equipment (ASTM B338). The chemistry and mechanical properties of Gr.12 are the same for both.
Is welded Grade 12 tubing acceptable for heat exchangers?
Yes - ASTM B338 covers welded tubing. The weld is verified by flattening, flaring/ring-expansion and non-destructive examination, and welded tube is widely accepted in condensers and coolers.
Products Description
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GR12 Titanium Tube |
ASTM B337 Gr12 Titanium Tube |
High Purity GR12 Titanium Tubing |
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Ti-0.3Mo-0.8Ni Tube |
GR12 Titanium Heat Exchanger Tube |
Gr12 Titanium Hydraulic Tube |
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Titanium Alloy Gr12 Pipe |
Titanium Alloy 12 Chemical Processing Pipe |
Cold Worked GR12 Titanium Tubing |
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Seamless GR12 Titanium Tubing |
GR12 Titanium Pipe Supplier |
Precision GR12 Titanium Pipe |
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Welded Titanium Gr12 Pipe |
GR12 Titanium Capillary Tube |
Titanium Gr12 Pipe Stock |
about us
Founded as a leading specialist in the global titanium industry, our company excels in the export and supply of premium titanium products for a diverse range of international applications. We are dedicated to providing high-performance materials that meet the stringent demands of sectors such as aerospace, chemical processing, marine, medical, and automotive engineering.
Our core expertise lies in our comprehensive portfolio of titanium mill products. We supply precision titanium tubes and titanium pipes for critical heat transfer and piping systems. Our inventory includes robust titanium plates, titanium sheets, and titanium slabs for structural and industrial fabrication. For machining and component manufacturing, we offer a full spectrum of titanium rods, titanium bars, titanium billets, and titanium wires. Additionally, we provide fine titanium coils and ultra-thin titanium foil for specialized technological and industrial uses.
