05 / PRECISION TUBES & PIPES
Precision Tubes & Pipes
High-purity seamless and welded stainless steel tubing for semiconductor, pharmaceutical, instrumentation, and critical fluid systems — supplied to your exact dimensional, material, and surface-finish specification.
PRECISION TUBING & PIPING
Precision Tubes & Pipes
Precision tubes and pipes are seamless and welded clean stainless steel tube, manufactured to exceptionally tight dimensional tolerances and finished to a specified internal surface grade. They are the standard choice for high-purity gas and fluid lines in semiconductor, pharmaceutical, food-grade, and instrumentation service, where cleanliness and corrosion resistance matter as much as dimension. PCX sources precision tubing from qualified international manufacturers and supplies it to your exact specification.
- Seamless clean pipe — OD 1/16" to 450A
- Welded clean pipe — OD 1/2" to 800A
- Standard grades — TP/SUS 304, 304L, 316, 316L
- High-purity grades — V-1, V-2, V-3 (SUS 316L)
- Four internal surface finishes — AP · BA · MP · EP
- Cold drawn / cold rolled, to ASTM, JIS, DIN, EN, and customer standards
Applications: semiconductor and high-purity gas lines, pharmaceutical, food-grade and sanitary systems, instrumentation and impulse lines, process piping, hydraulic systems, critical fluid handling
Documentation
Catalogs and technical documentation are available upon request. Please contact our team for product information, specifications, and documentation.
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MATERIALS
Materials & Grades
| Grade | Designation | Typical use |
|---|---|---|
| Austenitic 304 | TP304 / TP304L / SUS304 / SUS304L | General clean process and structural service |
| Austenitic 316 | TP316 / TP316L / SUS316 / SUS316L | Higher corrosion resistance, chloride service |
| High-purity 316L | V-1 / V-2 / V-3 (SUS316L) | Ultra-high-purity semiconductor and pharma lines |
Grades supplied per ASTM, JIS, DIN, EN, or your own standard. State the grade your service requires.
MANUFACTURING RANGE
Range by Diameter
| Product type | OD range | Condition |
|---|---|---|
| Seamless clean pipe | 1/16" – 450A | Cold drawn / cold rolled |
| Welded clean pipe | 1/2" – 800A | Cold rolled |
Wall thickness, length, and end finish supplied to your specification. Send us your OD, wall, grade, finish, and standard.
SURFACE FINISHES
Internal Surface Finish
For precision tube it is the internal surface — the bore — that defines the product. The bore is finished to a specified grade, from a pickled matte surface for general process lines to a bright, mirror-smooth electropolished finish for ultra-high-purity gas and pharmaceutical service. A smoother, passivated bore means lower particle entrapment, easier cleaning, and better corrosion resistance — which is why the finish grade is specified alongside the material and dimension.
Documentation
Catalogs and technical documentation are available upon request. Please contact our team for product information, specifications, and documentation.
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Surface Finishes — AP · BA · MP · EP
AP
As Pickled
Pickled & annealed bore — General process and structural lines
BA
Bright Annealed
Smooth, bright bore — Cleaner fluid contact, instrument gas
MP
Mechanically Polished
Low-roughness polished bore — High-purity gas and liquid lines
EP
Electropolished
Mirror electropolished & passivated bore — Ultra-high-purity semiconductor & pharma
The finish grade sets the degree of polishing and passivation applied to the internal surface. Specify the grade your process requires.
MANUFACTURING PROCESS
From Mother Pipe to Finished Grade
Each tube progresses through a controlled sequence of forming, surface treatment, and cleaning steps. The final internal surface grade — AP, BA, MP, or EP — determines how far along the polishing and passivation sequence each tube is taken before inspection and packaging.
- 01Mother Pipe
- 02Cold Drawn / Cold Rolled
- 03Pickled & Annealed
- 04Bright Annealed
- 05Mechanically Polished
- 06Electropolished
- 07Passivation
- 08Cleaning
- 09Inspection
QUALITY CONTROL
Tested & Verified
| Stage | Checks |
|---|---|
| Laboratory testing | Chemical composition · surface roughness · hardness · grain size · inter-granular corrosion · mechanical tests |
| Visual & NDT | Finished-product inspection · eddy-current · ultrasonic · water pressure test |
Mill test certificates supplied with each shipment. Additional third-party inspection available on request.
PRODUCT GALLERY
Product Gallery
Welded clean pipe
Large diameter
Cold-rolled welded stainless pipe up to 800A for process and utility lines.
Seamless clean tube
Tight-tolerance bore
Seamless drawn tube with a uniform, pickled-and-annealed internal bore.
Bright / EP tube
High-purity finish
Bright-annealed and electropolished tube for high-purity gas and pharma lines.
Polished tubing
Mirror finish
Mirror-finish precision tubing for sanitary and ultra-high-purity service.
Frequently Asked Questions
What is the difference between AP, BA, MP, and EP surface finish?
They are four internal surface grades of the same precision tube, from least to most refined. AP (As Pickled) is a pickled and annealed bore for general process lines. BA (Bright Annealed) is a smooth, bright bore for cleaner fluid contact. MP (Mechanically Polished) gives a low-roughness bore for high-purity gas and liquid. EP (Electropolished) is a mirror-finish, electropolished and passivated bore for ultra-high-purity semiconductor and pharmaceutical service. Specify the grade your process requires.
What is the difference between seamless and welded precision tube?
Seamless tube is drawn from a solid billet with no weld seam, giving uniform wall structure for higher-pressure and the most critical high-purity lines; we supply it OD 1/16" to 450A. Welded clean tube is formed and welded from strip, then cold rolled and finished; it covers larger diameters up to 800A economically. Both are supplied in 304/316/316L and in any of the AP/BA/MP/EP finishes.
Which grade and finish should I choose for semiconductor or pharmaceutical service?
High-purity semiconductor and ultra-high-purity gas lines typically call for SUS 316L in an electropolished (EP) finish — the V-1, V-2, V-3 high-purity grades. Pharmaceutical, food-grade, and sanitary systems commonly use 316L in BA or EP. Standard clean process and instrumentation lines are usually 304 or 316 in AP or BA. Send us the service and any applicable standard and we will confirm the grade and finish.
What is an electropolished (EP) tube used for?
An electropolished tube has its internal surface electrochemically smoothed to a mirror finish and passivated, giving the lowest roughness and best corrosion resistance of the four grades. It is used for ultra-high-purity gas and chemical delivery in semiconductor fabrication and for pharmaceutical and biotech process lines where surface cleanliness is critical.
What is a sanitary or high-purity stainless tube?
Sanitary tube is clean stainless tube — usually 316L in a BA or EP finish — for pharmaceutical, biotech, food, and beverage systems where the bore must be smooth, crevice-free, and easy to clean. It is the same precision tube family described here, specified with a hygienic surface finish and to your dimensional standard.
What materials and sizes are available?
Standard grades are TP/SUS 304, 304L, 316, and 316L, plus V-1/V-2/V-3 high-purity 316L. Seamless clean pipe runs OD 1/16" to 450A and welded clean pipe 1/2" to 800A, cold drawn or cold rolled. Wall thickness, length, and end finish are supplied to your specification, to ASTM, JIS, DIN, EN, or customer standards.
How do I get a price or quotation?
Send us the outer diameter, wall thickness, material grade, surface finish (AP / BA / MP / EP), quantity, and delivery location. We source from qualified international manufacturers and supply to your specification across Thailand — use the inquiry button below or the contact page and we will return a quotation.
Ready to specify or order?
Send us your requirements — we'll source and supply to your spec.
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