Industrial Furnaces and Heat-Treatment Lines
Furnace piping and heat-treatment line components run in 310S for continuous service in hot air, supplied with plain or beveled ends prepared to the furnace builder's drawing.
ASTM A312 / ASME SA-312 / UNS S31008 / W.Nr. 1.4845
Stainless Steel 310S Seamless Pipes Manufacturer in Thailand
Produced to ASTM A312 at our Ban Bueng, Chonburi mill, TP310S stainless steel seamless pipes from Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd. serve welded furnace, heater and hot-gas lines that need oxidation resistance at high temperature. The grade is UNS S31008 (EN 1.4845), the low-carbon version of 310, and it belongs to our stainless steel seamless pipes range. Our office is in Bang Phli, Samut Prakan, and each length leaves the mill with an EN 10204 3.1 (3.2 on request) certificate.
Stainless Steel 310S seamless pipeUNS S31008 / W.Nr. 1.4845
- 6 to 1016 mmOutside diameter
- 1 to 65 mmWall thickness
- Up to 18 mLength
- EN 10204 3.1Test certificate
EN 10204 3.1 certificate / 3.2 on request
ASTM A312 TP310S Stainless Steel Seamless Pipe Specifications
Each line of SS 310S seamless pipe can be called up as an NPS with a stainless schedule or as a finished OD and wall, and the table sets out what the mill produces and how it is delivered.
- Standard
- ASTM A312 / ASME SA-312
- Grade
- TP310S (UNS S31008)
- Outside Diameter
- 6 to 1016 mm
- Wall Thickness
- 1 to 65 mm
- Length
- Up to 18 mincluding cut lengths
- Dimensions
- ASME B36.19MSch 5S, 10S, 40S and 80S, or OD and wall to drawing
- End Type
- Plain endbeveled end; threaded end on Sch 40S and 80S
- Surface Finish
- Pickled and passivated (hot finished), bright annealed (cold drawn), polished
- Form
- Seamless
- Manufacturing Route
- 1Hot piercing over a mandrel
- 2Hot rolling and cold drawing to size
- Delivery Condition
- Solution annealed and rapidly cooled
- Test Certificate
- EN 10204 3.13.2 on request
ASTM A312 / ASME SA-312 covers austenitic stainless steel pipe for high-temperature and general corrosive service, and TP310S is one of its listed grades. Our ASTM A312 stainless steel 310S seamless pipe is made without welding at any stage of production, then solution annealed and delivered free of scale. Dimensions follow ASME B36.19M, and the standard also accepts the outside diameter and wall thickness on your drawing when every other requirement is met.
Every ASTM A312 TP310S stainless steel seamless pipe receives a hydrostatic test or a nondestructive electric test. Tension tests are taken on one pipe from each lot of up to 100 pipes, and flattening tests on a sample from each lot. Results are recorded on an EN 10204 3.1 (3.2 on request) material test certificate with heat number, chemistry and mechanical values. The document pack can be built around your inspection plan from raw material certificates, 100% PMI records, heat treatment charts, surface roughness and size measurement and a laboratory test certificate from a government-approved lab, with third-party inspection available on request. Intergranular corrosion testing to ASTM A262 Practice E is added when your order calls for it.
Chemical Composition of UNS S31008 Seamless Pipe
Each heat of UNS S31008 seamless pipe is analyzed against the TP310S limits in ASTM A312. Chromium at 24.0 to 26.0% and nickel at 19.0 to 22.0% form the 25-20 base, and molybdenum has a 0.75% maximum with no minimum.
- CrChromium, 24.0 to 26.0
- NiNickel, 19.0 to 22.0
- MnManganese, 2.00 max
- SiSilicon, 1.00 max
- MoMolybdenum, 0.75 max
UNS S31008310S
| Element | TP310S Limit (%) |
|---|---|
| C (Carbon) | 0.08 max |
| Mn (Manganese) | 2.00 max |
| P (Phosphorus) | 0.045 max |
| S (Sulfur) | 0.030 max |
| Si (Silicon) | 1.00 max |
| Cr (Chromium) | 24.0 to 26.0 |
| Ni (Nickel) | 19.0 to 22.0 |
| Mo (Molybdenum) | 0.75 max |
Nitrogen and the other elements carry no requirement for TP310S.
Mechanical Properties of Seamless WNR 1.4845 Pipe
Every lot of seamless WNR 1.4845 pipe is solution annealed at 1040 °C (1900 °F) minimum, rapidly cooled and tension tested against these ASTM A312 minimums.
| Property | Value |
|---|---|
| Tensile Strength, min | 515 MPa (75 ksi) |
| Yield Strength, min | 205 MPa (30 ksi) |
| Elongation in 2 in. or 50 mm, min, longitudinal | 35% |
| Elongation in 2 in. or 50 mm, min, transverse | 25% |
Equivalent Designations of Stainless Steel 310S
Stainless steel 310S is known by these designations in American, European, ISO, Japanese and Chinese standards.
- USA (ASTM / ASME)ASTM A312 / ASME SA-312 TP310S
- USA (UNS)UNS S31008
- USA (AISI)AISI 310S
- Europe (EN / WNR)1.4845
- ISOX8CrNi25-21
- Japan (JIS)SUS310S
- China (GB)S31008 (ISC) / 06Cr25Ni20
SS 310S Seamless Pipe Sizes and Tolerances
Within the envelope in the specification table, we make SS 310S seamless pipe to ASME B36.19M schedules or to the OD and wall on your isometric. Where an instrument line or heat exchanger calls for a finished OD and wall rather than an NPS, the grade is also made as 310S seamless tubes.
NPS and Schedule Wall Thickness
Furnace, heater and hot-gas lines often run in mid and large bores, so the rows below cover NPS 4 to NPS 30. Nominal wall thickness in mm, per ASTM A312 Table X1.1:
| NPS | OD (mm) | Sch 10S | Sch 40S | Sch 80S |
|---|---|---|---|---|
| 4 | 114.3 | 3.05 | 6.02 | 8.56 |
| 8 | 219.1 | 3.76 | 8.18 | 12.70 |
| 12 | 323.9 | 4.57 | 9.53 | 12.70 |
| 24 | 610 | 6.35 | 9.53 | 12.70 |
| 30 | 762 | 7.92 | - | - |
Swipe sideways to see the full table.
Wall and Outside Diameter Tolerances
Permitted variations for A312 pipe: wall tolerance is a percentage of nominal wall and depends on NPS and on the wall-to-OD ratio (t/D).
| NPS | t/D | Wall Tolerance |
|---|---|---|
| 1/8 to 2-1/2 | All | +20.0% / -12.5% |
| 3 to 18 | Up to 5% | +22.5% / -12.5% |
| 3 to 18 | Over 5% | +15.0% / -12.5% |
| 20 and larger | Up to 5% | +22.5% / -12.5% |
| 20 and larger | Over 5% | +15.0% / -12.5% |
| NPS | OD Tolerance (mm) |
|---|---|
| 1/8 to 1-1/2 | +0.4 / -0.8 |
| Over 1-1/2 to 4 | +0.8 / -0.8 |
| Over 4 to 8 | +1.6 / -0.8 |
| Over 8 to 18 | +2.4 / -0.8 |
| Over 18 to 26 | +3.2 / -0.8 |
| Over 26 to 34 | +4.0 / -0.8 |
| Over 34 to 48 | +4.8 / -0.8 |
Cut lengths are held to -0 / +6 mm (1/4 in).
TP310S Compared with Grade 310 and TP310H
Stainless steel 310S seamless pipe is the low-carbon member of the 310 family. Its 0.08% carbon maximum reduces the risk of sensitization during welding compared with stainless steel 310 seamless pipes, so TP310S is the grade for furnace and heater piping that is welded in the shop or on site.
Where creep and stress rupture strength govern the design, the A312 grade to order is TP310H, which we make as ASTM A312 TP310H seamless pipes.
Industrial Applications of Seamless 1.4845 Stainless Steel Pipe
Furnace, refinery, power and process plants specify seamless 1.4845 stainless steel pipe where hot oxidizing gas and welded fabrication meet on the same line.
Petroleum Refining and Petrochemical Furnaces
Cracker and reformer furnaces in petrochemical plants, and hot-gas lines in refineries, take TP310S seamless pipe ordered by NPS and schedule to match the heater piping specification.
Power Generation and Fluidized Bed Furnaces
Boiler-side piping, fluidized bed furnace piping and hot flue-gas connections in power plants use 310S seamless pipe, which resists scaling through continuous high-temperature service.
Heat Exchangers and Boilers
Hot-end headers and connecting pipework on heat exchangers and boilers run in seamless 310S, with Sch 80S walls available where a header carries pressure as well as heat.
Sintering, Cement and Ore Processing Plants
Sintering plants, cement works and ore processing lines in steel plants use seamless 310S for hot-air, burner and off-gas piping that runs at high temperature in an oxidizing atmosphere.
Thermal Processing and Brazing Equipment
Thermal processing equipment and brazing furnaces use seamless stainless steel 310S pipe for atmosphere and hot-gas lines that see repeated heating and cooling cycles.
Food Processing
Ovens and high-temperature food processing equipment use seamless 310S where heat resistance is needed alongside a polished surface for hygienic duty, with the finish set line by line.
Shipping and Packaging of Seamless S31008 Stainless Steel Pipe
Bundling
Each bundle wrapped and sleeved in woven bags, or packed in wooden or plywood cases built for sea freight.
Marking
NPS or OD, schedule or average wall, heat number, ASTM A312 TP310S and SML stenciled along each length, with ET or UT added when performed.
End preparation
Cut to length and beveled before dispatch, threaded ends on Sch 40S and 80S on request, and plastic caps on every end.
Paperwork
The packing list and the EN 10204 3.1 (3.2 on request) certificate travel with each consignment.
Incoterms
FOB, CIF or CFR, as stated on the quotation.
Lead time
Given line by line on each quotation, for stock lengths or a production slot.
Seamless Stainless Steel 310S Pipe Price per kg
ASTM A312 stainless steel 310S seamless pipe is indicatively priced at around USD 5.5 to 9.5 per kg. The price follows nickel closely and moves with NPS, schedule, length, quantity, finish and extra testing, and small-bore and large-diameter sizes sit at the top of the band. Send your size list to Thaida for a firm, dated quotation.
Indicative price, Stainless Steel 310S Seamless Pipes
USD 5.5 to 9.5 per kg
Indicative only. Send your sizes and specification to Thaida for a firm quotation.
- Outside diameter
- Schedule
- Length
- Finish
- Quantity
- Testing and certification
- Nickel price
Manufacturer and Exporter in Thailand
Every 310S stainless steel seamless pipe we sell is pierced, hot rolled (and cold drawn where specified) and annealed at our factory, 154 Moo.1 Map Phai, Ban Bueng, Chonburi 20170, Thailand. Drawings, quotations and order follow-up are handled by our office, 89/18 Moo.15 Enterprize Park, Bangna-Trad Road, Bang Kaeo, Bang Phli, Samut Prakan 10540, Thailand. Shipments go to sites within Thailand and to customers in Singapore, Malaysia, Vietnam, Indonesia, the Philippines and India.
Factory154 Moo.1 Map Phai, Ban Bueng,
Chonburi 20170, Thailand
Chonburi 20170, Thailand
Office89/18 Moo.15 Enterprize Park, Bangna-Trad Road,
Bang Kaeo, Bang Phli, Samut Prakan 10540, Thailand
Bang Kaeo, Bang Phli, Samut Prakan 10540, Thailand
Exporting to
- Singapore
- Malaysia
- Vietnam
- Indonesia
- Philippines
- India
FAQ on Seamless TP310S Pipe
Why specify TP310S rather than grade 310 for welded hot-gas piping?
TP310S holds carbon to 0.08% maximum, against up to 0.25% in grade 310, so its welded joints are less prone to sensitization. For hot-gas lines assembled by welding, 310S keeps the same 25-20 chromium-nickel base with the lower carbon. Every 310S stainless steel seamless pipe we ship carries a certificate against the TP310S limits of ASTM A312.
Which carbon limits separate TP310S from TP310H?
TP310H holds carbon between 0.04 and 0.10% and needs grain size No. 6 or coarser, while TP310S has a 0.08% maximum with no lower limit. Order TP310H when creep and stress rupture govern the design. For welded lines where oxidation resistance is the main duty, specify TP310S.
Which surface finish comes on hot-finished and cold-drawn TP310S?
Hot-finished pipe is supplied pickled and passivated, the typical mill finish, and cold-drawn pipe has a bright finish. Polished surfaces are available for hygienic equipment such as food processing ovens. State the finish for each line item on your inquiry.
Does the 0.75% molybdenum allowance make 310S fit for chloride service?
No. ASTM A312 sets 0.75% molybdenum as a maximum with no minimum, and 310S is not intended for aqueous corrosion service in chloride environments. Where chloride-bearing water is part of the duty, a molybdenum-alloyed grade such as 316L seamless pipes adds resistance to chloride pitting and crevice corrosion.
What OD and wall tolerances apply at NPS 4 Sch 40S?
For NPS 4 (114.3 mm OD), the OD tolerance is +0.8 / -0.8 mm. The Sch 40S wall of 6.02 mm is more than 5% of the OD, so the wall tolerance is +15.0% / -12.5% of nominal. Cut lengths are held to -0 / +6 mm.
Which extra tests can be added to a TP310S order?
Beyond the hydrostatic or electric test on every length, you can order ASTM A262 Practice E intergranular corrosion testing (S7), product analysis (S1), a transverse tension test on NPS 8 and larger (S2) or flattening on each pipe (S3). Results are added to the EN 10204 3.1 (3.2 on request) certificate.
How large an OD and wall can Thaida produce in TP310S?
In UNS S31008 seamless pipe, our range tops out at 1016 mm OD and 65 mm wall and starts at 6 mm OD and 1 mm wall, in single lengths of up to 18 m. Orders can follow ASME B36.19M NPS sizes in Sch 5S, 10S, 40S and 80S, or the OD and wall on your drawing.
Request a Quote for Stainless Steel 310S Seamless Pipes
or email sales@thaida.co.th