Precision Tubes & Pipes

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.

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 400A. 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.

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.

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.

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.

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 400A and welded clean pipe 3/4" 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.

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.

Yes — alongside precision stainless tubing, PCX also sources seamless and welded carbon and low-alloy steel pipe for pressure service and structural applications, to ASTM, JIS, DIN, EN, or API standards on a made-to-order basis. Mill test certificates (EN 10204 3.1) are available on request. Contact us with your standard, grade, outer diameter, wall thickness or schedule, and quantity for a quotation.

They are the same product — black steel pipe is the common trade name for uncoated, mill-finish carbon steel pipe, as distinct from galvanized pipe. PCX supplies both seamless and welded carbon steel pipe in this uncoated black finish, in Schedule 40 or Schedule 80 wall thickness, to ASTM, JIS, DIN, EN, or API standards, made-to-order.