Why Choose Us For SS 347 Pipe
PED Approved, CE Approved
Accepted on EU pressure orders.
Cut To Length
Sawn, deburred and re-marked.
PMI on Request
Niobium checked before release.
Since 2007
Steady pipe supply from Mumbai.
SS 347 Pipe Tech Snapshot
Reach ASTM A312 TP347 Pipe Supplier In India In 10.3 to 610 mm OD
PED approved, CE approved ASTM A312 TP347 pipe from Mumbai.
Need a Stainless Steel 347 Pipe supplier in India? We ship seamless and welded TP347, cut to length.
ASTM A312 TP347 Pipe Specification
Tolerances, tests and compliance lines for your purchase order
ASTM A312 TP347 Pipe Hydrostatic Test
Wall stressed to 50% of minimum yield, held 5 s minimum
SS 347 Seamless Pipe NDE Option
Eddy-current or ultrasonic test accepted in place of hydro
347 Stainless Steel Pipe Wall Tolerance
Thinnest point may sit 12.5% below nominal, no more
SA312 TP347 Pipe Cut Length Tolerance
Not under the ordered length; up to 6 mm (1/4 in.) over
UNS S34700 Pipe Mill Random Length
4.6 – 7.3 m (15 – 24 ft) for NPS 1/8 to 8
SS 347 Welded Pipe Mechanical Tests
Tension test per lot; flattening test on 5% of the lot
347 Stainless Steel Seamless Pipe IGC Test
ASTM A262 Practice E under A312 S7, on request
Werkstoff 1.4550 Pipe Surface Finish
Scale-free, pickled; bright annealed or passivated to order
Stainless Steel 347 Pipe EU Compliance
PED approved to 2014/68/EU, CE approved supply
ASME SA312 TP347 Pipe Code Acceptance
ASME B31.1, B31.3 and BPVC Section II as SA-312
TP347 Stainless Pipe Sour Service Option
NACE MR0175 / ISO 15156 documentation on request
SS 347 Pipe Fittings Match
ASTM A403 WP347 fittings and A182 F347 flanges
347 SS Pipe Types
Nine forms from a Stainless Steel 347 Pipe stockist in India.
SS 347 Seamless Pipe
- No welding at any stage of making
- Hot finished or cold finished
- Usual pick for small-bore hot lines
347 Stainless Steel Welded (ERW) Pipe
- Automatic weld with no filler metal
- Single straight seam up to NPS 14
- Suits thin 5S and 10S walls
ASTM A312 TP347H Pipe
- Carbon held at 0.04 – 0.10%
- Grain size ASTM No. 7 or coarser
- Ordered for creep-range service
ASTM A358 347 EFW Pipe
- Rolled from plate, welded with filler
- Class 1 is fully radiographed
- Large-bore headers and ducting
UNS S34700 Schedule 40S & 80S Pipe
- 40S wall 2.77 mm at NPS 1/2
- 80S wall 3.73 mm at NPS 1/2
- Plain or bevelled ends
ASTM A269 347 Stainless Steel Tubing
- Seamless or welded general-service tube
- Ordered by OD and wall
- Instrument and utility lines
347 Stainless Steel 2.5 Inch Exhaust Pipe
- NPS 2-1/2 pipe is 73.0 mm OD
- 2.5 in. OD tube is 63.5 mm
- State pipe or tube on your RFQ
ASTM A213 TP347 Boiler Tube
- Seamless superheater and exchanger tube
- Covers TP347 and TP347H
- Cut to your tube length
ASME SA312 TP347 Pipe Cut To Length
- Sawn to your spool or cut list
- Heat number carried onto each piece
- Ends deburred before packing
Send NPS, schedule and cut lengths. We reply with a per-kg and per-piece TP347 pipe price, free of charge.
Stainless Steel 347 Pipe Chemical Composition
SS 347 vs 347H Pipe
Same chromium and nickel. The H grade fixes carbon for creep strength.
TP347
ASTM A312 · UNS S34700
- Carbon0.08% max
- Niobium10 × C min
- Anneal min, cold / hot finished1040 / 1040°C
- Grain size ruleNone set
- Tensile / yield515 / 205 MPa
- Order it forHeat & corrosion duty
TP347H
ASTM A312 · UNS S34709
- Carbon0.04 – 0.10%
- Niobium8 × C min
- Anneal min, cold / hot finished1100 / 1050°C
- Grain size ruleASTM No. 7 or coarser
- Tensile / yield515 / 205 MPa
- Order it forCreep duty above 538°C
Mumbai-Based Stainless Steel 347 Pipe Manufacturer, Active Since 2007
Niobium on each heat is matched against the mill certificate before a single length is loaded.
UNS S34700 Pipe Equivalent Grade List
Cross-references to use when a drawing or data sheet calls out a non-ASTM designation.
US
UNS
S34700
US
AISI / ASTM
347 / TP347
US
ASME
SA312 TP347
EU
EN (Werkstoff Nr.)
1.4550 / X6CrNiNb18-10
JP
JIS
SUS 347
RU
GOST
08Kh18N12B
UK
BS
347S31
FR
AFNOR
Z6CNNb18-10
SE
SS
2338
Review SS 347 Seamless Pipe Wall Thickness And Weight Chart As Per ASME B36.19M
Your Stainless Steel 347 Pipe stockist in Mumbai. Wall and weight listed from NPS 1/8 to 24. For 347 stainless steel 2.5 pipe, confirm pipe or tube.
NPS 2-1/2 Pipe
73.0 mm OD
Sch 10S
3.05 mm wall · 5.26 kg/m
Sch 40S
5.16 mm wall · 8.63 kg/m
2.5 in. OD Tube
63.5 mm OD, ordered by wall
SS 347 Pipe Schedule 40/80 Dimensions
Wall (mm) and mass (kg/m) in four stainless schedules.
| NPS | OD (mm) | 5S WT | 5S kg/m | 10S WT | 10S kg/m | 40S WT | 40S kg/m | 80S WT | 80S kg/m |
|---|---|---|---|---|---|---|---|---|---|
| 1/8 | 10.3 | – | – | 1.24 | 0.28 | 1.73 | 0.37 | 2.41 | 0.47 |
| 1/4 | 13.7 | – | – | 1.65 | 0.49 | 2.24 | 0.63 | 3.02 | 0.80 |
| 3/8 | 17.1 | – | – | 1.65 | 0.63 | 2.31 | 0.84 | 3.20 | 1.10 |
| 1/2 | 21.3 | 1.65 | 0.80 | 2.11 | 1.00 | 2.77 | 1.27 | 3.73 | 1.62 |
| 3/4 | 26.7 | 1.65 | 1.02 | 2.11 | 1.28 | 2.87 | 1.69 | 3.91 | 2.20 |
| 1 | 33.4 | 1.65 | 1.29 | 2.77 | 2.09 | 3.38 | 2.50 | 4.55 | 3.24 |
| 1-1/4 | 42.2 | 1.65 | 1.65 | 2.77 | 2.69 | 3.56 | 3.39 | 4.85 | 4.47 |
| 1-1/2 | 48.3 | 1.65 | 1.90 | 2.77 | 3.11 | 3.68 | 4.05 | 5.08 | 5.41 |
| 2 | 60.3 | 1.65 | 2.39 | 2.77 | 3.93 | 3.91 | 5.44 | 5.54 | 7.48 |
| 2-1/2 | 73.0 | 2.11 | 3.69 | 3.05 | 5.26 | 5.16 | 8.63 | 7.01 | 11.41 |
| 3 | 88.9 | 2.11 | 4.52 | 3.05 | 6.46 | 5.49 | 11.29 | 7.62 | 15.27 |
| 4 | 114.3 | 2.11 | 5.84 | 3.05 | 8.37 | 6.02 | 16.07 | 8.56 | 22.32 |
| 6 | 168.3 | 2.77 | 11.31 | 3.40 | 13.83 | 7.11 | 28.26 | 10.97 | 42.56 |
| 8 | 219.1 | 2.77 | 14.78 | 3.76 | 19.97 | 8.18 | 42.55 | 12.70 | 64.64 |
| 10 | 273.0 | 3.40 | 22.60 | 4.19 | 27.77 | 9.27 | 60.29 | 12.70 | 81.52 |
| 12 | 323.8 | 3.96 | 31.23 | 4.57 | 35.98 | 9.53 | 73.86 | 12.70 | 97.43 |
| 14 | 355.6 | 3.96 | 34.34 | 4.78 | 41.35 | – | – | – | – |
| 16 | 406.4 | 4.19 | 41.56 | 4.78 | 47.34 | – | – | – | – |
| 18 | 457 | 4.19 | 46.79 | 4.78 | 53.31 | – | – | – | – |
| 20 | 508 | 4.78 | 59.32 | 5.54 | 68.64 | – | – | – | – |
| 24 | 610 | 5.54 | 82.58 | 6.35 | 94.53 | – | – | – | – |
347 Stainless Steel Tubing Stockist in Mumbai Since 2007, With Road Dispatch to Ahmedabad
Buy one length or a full bundle; both are tagged and certified the same way.
ASME SA312 TP347 Pipe Mechanical Properties
Room-temperature minimums from ASTM A312 Table 4, reported heat by heat on the MTC.
515MPa min
Tensile Strength (75 ksi)
205MPa min
Yield Strength (30 ksi)
35% min
Elongation in 50 mm, Longitudinal
25% min
Elongation in 50 mm, Transverse
High-intent query from UAE refinery & petrochemical EPC buyers
SS 347 vs 321 vs 316 Pipe Difference
A Stainless Steel 347 Pipe supplier in UAE hears this often. Compare before you substitute.
SS 347
ASTM A312 TP347 · UNS S34700
- Key additionNiobium, 10 × C min
- Min. tensile / yield515 / 205 MPa at any wall
- After 427–816°C exposureHolds corrosion resistance best
- Weld fillerER347, matching
- Chosen forWelded hot & oxidizing service
SS 321
ASTM A312 TP321 · UNS S32100
- Key additionTitanium, 0.70% max
- Min. tensile / yield485 / 170 MPa if seamless over 9.5 mm wall
- After 427–816°C exposureStabilized, but loses more than 347
- Weld fillerER347; titanium transfers poorly in the arc
- Chosen forGeneral stabilized high-heat duty
SS 316
ASTM A312 TP316 · UNS S31600
- Key additionMolybdenum, 2.00 – 3.00%
- Min. tensile / yield515 / 205 MPa
- After 427–816°C exposureNot stabilized
- Weld fillerER316
- Chosen forChloride & wet-corrosion lines
Common check from South African power & synfuel plant buyers
347 Stainless Steel Seamless Pipe Intergranular Corrosion Resistance
Niobium in 347 blocks chromium loss between 427 and 816°C. Top row: why it works. Bottom row: what to order.
Risk Window
427–816°C·800–1500°F
Niobium Lock
Nb at 10 × C or more·Binds carbon
Chromium Kept
Grain boundaries·Stay protected
IGC Test
ASTM A262·Practice E
Stabilizing Anneal
A312 S6·On request
Refinery Duty
Polythionic acid·SCC resistant
ASTM A358, A213 & A269 Standards for 347 Stainless Steel Tubing
One grade, six specifications. Quote the right one for your order.
ASTM A312
Seamless, welded & HCW pipe
ASTM A358
EFW pipe, Classes 1 to 5
ASTM A376
Seamless high-temperature pipe
ASTM A213
Boiler & superheater tube
ASTM A269
General-service tubing
ASTM A999
General pipe requirements
TP347 Seamless Pipe Pressure Rating in Sch 40S & 80S
Design pressure for seamless TP347 up to 38°C, worked out per ASME B31.3. It is not the mill hydrotest figure.
1/2″
1″
2″
2-1/2″
3″
4″
6″
8″
No corrosion allowance is included. For hotter service use the ASME B31.3 Table A-1 stress at design temperature. Welded pipe takes a joint factor below 1.00 unless the seam is fully radiographed.
ASTM A312 TP347H Pipe Exporter in India to Jebel Ali, UAE
Wooden cases, end caps and a heat-wise packing list travel with every export lot.
SS 347H & 347 Pipe High Temperature Applications
Nine duties we quote most as a Stainless Steel 347 Pipe supplier in Mumbai.
Carbide range it withstands
427–816°C (800–1500°F)
ASME code ceiling
816°C (1500°F)
Above 538°C (1000°F)
Carbon 0.04% min; order 347H
Coldest ASME use, no impact test
−250°C (−425°F)
347 Stainless Steel Pipe Price Per Kg in India
As a Stainless Steel 347 Pipe manufacturer in India, we quote per kg on eight inputs.
Indicative range seen on published Indian trade listings. It is not a quotation; rates move with nickel.
ALLOY INPUT
Nickel & Niobium
Surcharges shift the rate monthly.
MAKING ROUTE
Seamless or Welded
Seamless costs more than welded.
GRADE
347 or 347H
H-grade may carry a premium.
WALL
Bore & Schedule
Small bores, heavy walls cost more.
PAPERWORK
Tests & Certificates
3.2, IGC, PMI, NACE add charges.
PROCESSING
Cut To Length
Sawing and bevelling charged per cut.
VOLUME
Order Quantity
Full bundles cost less per kg.
TERMS
Incoterm & Currency
FOB or CIF changes landed rate.
Dispatch Footprint
TP347 Pipe Supply Map: Export Markets & Indian Cities
A Stainless Steel 347 Pipe exporter with containers leaving Nhava Sheva and trucks running to plants across India.
Delivery Estimate
How long a 347 pipe order takes.
- Stock sizes: 2–5 working days
- Cutting adds sawing time
- Mill sizes quoted separately
- Loaded at Nhava Sheva (JNPT)
- Jebel Ali: about 5 days
- Singapore: about 12 days
- For urgent short lengths
- Flown from Mumbai airport
- Priced on chargeable weight
- Port-to-door ETA on each offer
- Customs time included
- Revised if a sailing rolls
Sea transit varies by carrier and destination line. Follow the ETA on your quotation.
ASME SA312 TP347 Pipe Supplier in Bengaluru With PED Approved, CE Approved Papers
Fabricators receive cut pieces with certificates matched length by length.
SA 312 TP 347 Pipe FAQs
Quick answers procurement teams want before raising a 347 pipe order.
What is the price of Stainless Steel 347 Pipe?
- Indian trade listings show about INR 250 – 600 per kg
- Seamless pipe sits near INR 410 – 560 per kg
- Send size, schedule and quantity for a firm quote
What sizes does Stainless Steel 347 Pipe come in?
- NPS 1/8 to NPS 24, 10.3 mm to 610 mm OD
- Sch 5S, 10S, 40S and 80S per ASME B36.19M
- Other walls to ASME B36.10M on request
What is the composition of TP347H?
- Carbon 0.04 – 0.10%, chromium 17.0 – 19.0%, nickel 9.0 – 13.0%
- Niobium at least 8 times the carbon content
- Mn 2.00%, Si 1.00%, P 0.045% and S 0.030% maximum
What is the difference between SS 347 and SS 321 pipe?
- 347 is niobium stabilized; 321 is titanium stabilized
- Titanium transfers poorly in a weld arc, so ER347 filler welds both
- Seamless 321 over 9.5 mm wall drops to 485 / 170 MPa; 347 stays at 515 / 205 MPa
What is the equivalent grade of SS 347 pipe?
- UNS S34700 and Werkstoff Nr. 1.4550 (X6CrNiNb18-10)
- JIS SUS 347 and BS 347S31
- GOST 08Kh18N12B and AFNOR Z6CNNb18-10
Is your 347 pipe PED approved and CE approved?
- PED approved under directive 2014/68/EU; CE approved supply
- EN 10204 3.1 with each lot; 3.2 witnessed on demand
- IGC, PMI and NACE MR0175 reports when specified
