ASTM A358 TP304H Stainless Steel EFW Pipes
Material Grade:ASTM A358 / ASME SA358 TP304H
Type:Welded Pipe
Outer Diameter:168mm-1828mm
Wall Thickness:3mm-30mm
Test:Radiographic Examination
Delivery Time:Stock 7 Days; MTO 30 Days
Trade Terms:EXW, Fob, CFR, CIF etc.
Heat Treatment Solution Annealed (min 1900°F / 1040°C)
Transport Package:Packed in Bundles or Plywooden Box
Trademark:GNEE
HS Code:7306110000
Send E-mail:info@gneestainless.com
Tel:+8615824687445
Description
Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of astm a358 tp304h stainless steel efw pipes in China. With abundant experience, we warmly welcome you to wholesale customized astm a358 tp304h stainless steel efw pipes from our factory. For price consultation, contact us.
ASTM A358 TP304H Stainless Steel EFW Pipe is an austenitic stainless steel pipe manufactured using the electric fusion welding (EFW) process, specifically designed for industrial applications operating in high-temperature and corrosive environments.
The TP304H stainless steel EFW pipes supplied by GNEE are produced using advanced German automatic plasma welding equipment, achieving single-side welding with double-side formation. After welding, the pipes undergo solution annealing treatment at 1040°C to ensure that the weld seam and base metal maintain consistent mechanical and corrosion-resistant properties. The process does not require filler metal, resulting in dense and uniform weld seams that are especially suitable for manufacturing large-diameter and heavy-wall pipes.
TP304H stainless steel pipe is the high-temperature strengthened version of 304 stainless steel, with carbon content controlled between 0.04–0.10%. Compared with standard TP304 or TP304L, TP304H offers more than 30% higher high-temperature creep strength and can operate stably for long periods in environments ranging from 600°C to 800°C.
GNEE can supply full-size SS 304H pipes with outer diameters ranging from 57 mm to 2680 mm and wall thicknesses from 1.2 mm to 60 mm, covering multiple schedule grades from SCH5S to SCH80S. All products are manufactured in strict accordance with ASTM A358 Class 3 non-destructive testing requirements, including 100% radiographic testing (RT) or ultrasonic testing (UT). Hydrostatic testing is performed at 1.5 times the design pressure to ensure pipeline safety and reliability. Customized dimensions and special surface treatment processes are also available according to customer requirements.
Specification of ASTM A358 EFW Pipes
| Product Name | 304H Weld Stainless Steel Pipes /Tubes | |
| Welding Line Type | EFW | |
| Specification | Outer diameter | 168mm-1828mm |
| Wall thickness | 3mm-30mm | |
| Length | Single random length/ Double random length or as customer's actual request | |
| Surface | Annealing&Pickling, Polishing180#-600#), Bright Annealing, Sand Blasting,Shot Blasting | |
| Hydraulic pressure testing | OD≤1.5m | |
| X-Ray Inspection | 100% filming | |
| Delivery Time | 1.for ready stock :7 days after receiving the deposit of T/T 2.For MTO: 35 days after receiving the deposit of T/T |
|
| Trade Terms | EXW,FOB, CFR, CIF etc. | |
| Remittance method | TT/LC/CASH | |
ASTM A358 Grade 304H Stainless Steel EFW Pipes Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 304H | min. | 0.04 | - | - | -0.045 | - | 18.0 | - | 8.0 | - |
| max. | 0.10 | 2.0 | 0.75 | 0.030 | 20.0 | 10.5 | ||||
ASTM A358 Grade 304H EFW Pipes Mechanical Properties
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 304H | 515 | 205 | 40 | 92 | 201 |
| 304H also has a requirement for a grain size of ASTM No 7 or coarser. | |||||
ASTM A358 304H Stainless Steel EFW Pipes Physical Properties In The Annealed Condition
Grade |
Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C (J/kg.K) | Electrical Resistivity (nΩ.m) | |||
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
| 304/304L/304H | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
ASTM A358 Class 3 Pipe Thickness Chart
| Nominal Pipe Size | Tolerance | |
| + | – | |
| ≥ 20, welded | 17.5 | 12.5 |
| 3~18, t/D≤ 5% | 22.5 | 12.5 |
| ≥ 20, seamless, t/D> 5% | 15.0 | 12.5 |
| 3~18, t/D> 5% | 15.0 | 12.5 |
| 1/8-2 1 /2 | 20.0 | 12.5 |
| ≥ 20, seamless, t/D≤ 5% | 22.5 | 12.5 |
Delivery Condition: Heat Treated + Pickled (Annealed and Pickled)
End Type: Plain End or Beveled End
For further information regarding procurement or technical specifications, please obtain the ASTM A358 technical documentation:
Click to view ASTM A358 TP304H PDF
Application Areas
Energy Sector: Superheater and reheater piping for supercritical and ultra-supercritical power plants
Petrochemical & Chemical Industries: Conveyance of high-temperature steam, acidic, and alkaline media
Nuclear Energy: Cooling systems, heat exchangers
ASTM A358 TP304H stainless steel EFW Pipes price
The price of ASTM A358 TP304H stainless steel EFW (Electric Fusion Welded) piping typically ranges from $500 to over $2,500 per ton-equivalent to approximately $12 to $22 per kilogram,with the specific price depending on the grade (Grades 1–5), wall thickness, and manufacturer.
| AISI 304H EFW Round Pipe manufacturer | US $300-1178 / Metric Ton (FOB Price) |
| SUS 304H EFW Pipe | US $289-1800 / Ton (FOB Price) |
| EFW Pipe TP 304H | US $1-100 / Piece (FOB Price) |
| High Quality Stainless Steel 304H EFW Pipes | US $1100-3567 / Ton (FOB Price) |
| Different Sizes of 304H Stainless Steel EFW Pipes | US $8.2-6 / Kilogram (FOB Price) |
Click to get the latest prices
NDT - Non-Destructive Testing
Hydrostatic Test: Each pipe must undergo a hydrostatic test at the specified standard pressure, with the pressure held for a minimum of 5 seconds to ensure there are no leaks.
Radiographic Testing (RT/X-Ray): A characteristic inspection for EFW pipes. The weld seams undergo either 100% or spot X-ray inspection to check for porosity, slag inclusions, or lack of penetration.
Eddy Current Test: Detects surface and near-surface defects.
Ultrasonic Test: Specifically for thick-walled pipes, detects internal longitudinal or transverse defects.
Marking & Packing
Our Stainless Steel 304H EFW Pipe is packaged to ensure no damage during transit. In the case of export, the standard export packing is in a wooden box. All Stainless Steel 304H EFW Pipe are marked with our grade, batch number, size and mark. We can also do custom branding on our products as per buyer's unique requirements
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