TP304 TP316L Stainless Steel Pipe Seamless Pipe Precison Cold Drawn
SS Pipes ASTM A269
Products Specification
Product Name | SA269 Stainless steel pipe |
Standard | ASTM AISI DIN, EN, GB, JIS |
Steel Grade | 200 Series: 201,202
300 Series: 301,304,304L,316,316L,316Ti,317L,321,309s,310s
400 Series: 409L,410,410s,420j1,420j2,430,444,441,436
Duplex Steel: 904L,2205,2507,2101,2520,2304 |
Outer Diameter | 6-325mm(as required) |
Thickness | 0.4mm - 10.0mm |
Length | 6m / pcs or custom other fixed length as request |
Technique | Seamless/Welded |
Surface | pickling finishing, BA , Hairline , polishing |
MOQ | 500 kgs |
Price Terms | FOB,CFR,CIF |
Bright Annealed Stainless Steel Tube (BA tube) is a kind of
high-precision stainless steel tube with special heat treatment and
surface treatment, which has a smooth, bright appearance and
excellent corrosion resistance. The following is a detailed
introduction to bright annealed stainless steel pipes:
1. Main Grade of Bright Annealed Stainless Steel Pipe Tube
Bright annealed stainless steel pipe commonly used stainless steel
grades include:
Austenitic stainless steel:
304/304L (06Cr19Ni10/022Cr19Ni10)
316/316 (06 cr17ni12mo2 l / 022 cr17ni12mo2)
321 (06Cr18Ni11Ti)
Martensitic or ferrite stainless steel:
430 (10Cr17)
420 (20Cr13)
2. Enforce standards
The production and inspection of bright annealed stainless steel
pipes usually follow the following international or national
standards:
International standard:
ASTM A269/A270 (Universal Seamless and Welded Austenitic Stainless
Steel Pipe)
ASTM A312 (Austenitic Stainless Steel Seamless Welded Pipe)
EN 10305 (Precision Seamless Steel Pipe)
Domestic standard:
GB/T 12771 (Welded stainless steel pipe for fluid transport)
GB/T 14976 (seamless stainless steel pipe for fluid transport)
YB/T 5363 (Bright annealed stainless steel welded steel pipe)
Step 3: Characteristics
High surface finish: through bright annealing treatment (heating
and cooling in an oxygen-free or protective atmosphere), the
surface is free of oxidation, a mirror or matte effect, roughness
(Ra) is usually ≤0.4μm.
Strong corrosion resistance: the annealing process eliminates the
processing stress, improves the uniformity of the material and the
resistance to intergranular corrosion.
High dimensional accuracy: suitable for occasions with strict
tolerances, such as instruments, medical equipment, etc.
Clean and pollution-free: no oil, no residue on the surface,
suitable for high clean environment (such as food, semiconductor
industry).
4. Application field
- Medical instruments: surgical instruments, medical catheters,
implants, etc. (commonly used 316L BA tube).
- Food and beverage industry: pipeline, dairy equipment, brewing
equipment, etc.
- Semiconductors and electronics: high purity gas/liquid delivery
systems, vacuum chambers.
- Automotive industry: fuel systems, sensor components.
- Home and decoration: high-end furniture, lamps, bathroom
accessories (such as 304 BA pipe).
5. Production process
- Cold rolling or cold drawing: Obtain high dimensional accuracy.
- Bright annealing: heating to 1050~1150°C under the protection of
hydrogen or nitrogen to avoid surface oxidation.
- Pickling or electrolytic polishing (optional) : Further improve the
surface finish.
- Non-destructive testing: ensure that there are no cracks, pores and
other defects.
6. The difference with other stainless steel pipes
- Characteristics Bright Annealing Tube (BA) Ordinary Annealing Tube
(AP) Pickling Tube (AP)
- Surface specular/matte, no oxide dull, oxide matte, slightly rough
- Excellent corrosion resistance (no decarburization layer) average
(need subsequent pickling) good (after pickling)
- Cost higher lower medium
Bright annealed stainless steel pipe with its high cleanliness,
corrosion resistance and aesthetics, widely used in the field of
hygiene and precision requirements. The selection should match the
brand and standard according to the specific working conditions
(such as medium, temperature, pressure).
