Womic Stainless Steel Co., Ltd
The 304H Stainless Steel Pipe produced by Womic Steel conforms to multiple international specifications used in pressure equipment and high-temperature service:
|
Standard |
Description |
Equivalent Grade / Material Number |
|
ASTM A312 / A213 / A269 |
Stainless Steel Pipes and tubes for pressure and high temperature service |
TP304H |
|
EN 10216-5 |
Seamless stainless steel tubes for pressure purposes |
1.4948 (X6CrNi18-10) |
|
DIN 17456 / DIN 17458 |
Austenitic stainless seamless tubes |
X6CrNi18-10 |
|
JIS G3459 |
Stainless steel pipes for general and heat-resisting use |
SUS304HTP |
|
GB/T 14976 |
Seamless stainless pipes for fluid transport |
0Cr18Ni9H |
These standards ensure that 304H Stainless Steel Pipe meets global requirements for chemical composition, mechanical performance, dimensional tolerance, and inspection procedures.
Different specifications can be customized according to special requirements.
|
Execution Standard |
Main Standard |
Standard Grade |
|
GB (China) |
GB13296, GB/T14976, GB5310, GB/T21833 |
06Cr19Ni10, 022Cr19Ni10, 06Cr25Ni20, 07Cr17Ni12Mo2, 022Cr17Ni12Mo2, 07Cr19Ni11Nb, 022Cr22Ni5Mo3N |
|
NB (China Petrochemical Standard) |
NB/T 47019.1, NB/T 47019.5, NB/T 47019.6, NB/T 47019.7, NB/T 47019.9 |
06Cr19Ni10, 022Cr19Ni10, 06Cr25Ni20, 07Cr17Ni12Mo2, 06Cr19Ni13Mo3, 07Cr18Ni11Ti, 07Cr18Ni11Nb |
|
ASTM (USA) |
ASTM / ASME SA213,ASTM A249-24,ASTM A269,ASTM A312-24, ASTM A358-24, ASTM A376,ASTM A450,ASTM A511, ASTM B677, ASTM B622, ASTM B626, ASTM B464, ASTM B466,ASTM B677,ASTM A778-24, ASTM A813-24, ASTM A1016-23, ASTM A999-23, ASTM A789-24, ASTM A790-24 |
304 / 304L,304N,TP304H,TP309,TP310S,S 316 / 316L,TP316H,TP316N,TP316LN,TP316Ti,TP317L / 317,321 / 321H, 347 / 347H, S31254 (904L equivalent), S31803 (Duplex), S32205, S32750, S32760, S32404, S32550, S32520, S32900, S39274,UNS N08825, UNS N06625, UNS N10276,Alloy 20, Incoloy 800, Inconel 600, Inconel 690, Hastelloy B2, Alloy 200/201, Hastelloy C22 |
|
ASME (USA) |
SA/SB213, SA268, SA312, SA376, SA789, SA790, SB407, SB423, SB444, SB677 |
TP304/L/H, TP316/L/H/Ti, TP321/H, TP347/H, TP904L, S31254, S31803, S32205, S32750, S32760, N08810, N08825, N08020 |
|
EN / DIN (Europe) |
EN 10216-5, EN 10297-2, EN 10217-7 (2021),EN 10312 |
X2CrNi18-9 (1.4307), X5CrNi18-10 (1.4301), X2CrNiMo17-12-2 (1.4404), X5CrNiMo17-12-2 (1.4401), X6CrNiMoTi17-12-2 (1.4571), X2CrNiMoN22-5-3 (1.4462) |
|
JIS (Japan) |
JIS G3459, JIS G3463 |
SUS304/TP, SUS304LTP, SUS304HTB, SUS316/TP, SUS316LTP, SUS321TP, SUS347TP, SUS310STP |
|
GOST (Russia) |
GOST 9941, GOST 5632 |
08Х18Н10, 12Х18Н10Т, 10Х17Н13М2Т, 03Х17Н14М3, 08Х22Н6Т, 10Х17Н13М2Т, 03Х21Н21М4ГБ |
|
ISO (International) |
ISO 1127, ISO 9329-4 |
X2CrNi18-9, X2CrNiMo17-12-2, X2CrNiMoN22-5-3, X2CrNiMo17-13-3 |
|
Element |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
|
304H Stainless Steel Pipe |
0.04–0.10 |
≤2.00 |
≤0.045 |
≤0.03 |
≤1.00 |
18.0–20.0 |
8.0–11.0 |
Compared with standard 304 stainless steel,304H Stainless Steel Pipe contains higher carbon content, which significantly improve screep strength and high-temperature mechanical performance.
304H stainless steel pipe provides reliable strength and structural stability in elevated temperature environments.
Property
Unit
304H
Tensile Strength
MPa
≥515
Yield Strength
MPa
≥205
Elongation
%
≥40
Hardness (Brinell)
HBW
≤201
Density
g/cm³
7.93
Melting Range
°C
1400–1450
304H Stainless Steel Pipes are typically solution annealed at 1040–1100°C followed by rapid cooling.
This heat treatment restores full corrosion resistance, improves ductility, and ensures the pipes maintain stable mechanical properties during high-temperature service.
304H Stainless Steel Pipes are normally supplied in the following conditions:
• Annealed and pickled (AP finish)
• Bright annealed surface
• Polished surface upon request
Womic Steel adopts advanced production technology to ensure each 304H Seamless Stainless Steel Pipe meets exact specifications and flawless surface quality.
1.Raw Material Selection: High-quality 304H Stainless Steel Pipe billets from certified mills (Baosteel, TISCO, POSCO).
2.Heating and Piercing: Billets heated to a controlled temperature and pierced using a rotary piercing mill to form hollow shells.
3.Hot Rolling: Shells elongated and rolled to desired size.
4.Cold Drawing / Cold Pilgering: Pipes refined to precise dimensions and improved surface finish.
5.Solution Annealing: Heat treatment to restore corrosion resistance and ductility.
6.Pickling & Passivation: Removal of oxides and creation of passive film for enhanced corrosion protection.
7.Straightening and Dimensional Calibration: Ensures consistent roundness and wall uniformity.
8.Final Inspection & Marking: Each pipe tested, marked with grade, heat number, and standard before packing.
This process guarantees a smooth internal bore, high structural integrity, and exceptional corrosion resistance across all batches of Womic Steel’s 304H Seamless Steel Pipe.
Womic Steel utilizes state-of-the-art manufacturing technology to ensure every304H Welded Stainless Steel Pipe meets precise specifications and delivers excellent surface quality and performance.
1.Raw Material Selection: High-quality304H stainless steel strips/coils from certified suppliers (e.g., Baosteel, TISCO, POSCO).
2.Slitting & Uncoiling: The steel coil is slit to the required width and uncoiled for feeding into the forming mill.
3.Forming & Welding: The strip is progressively formed into a cylindrical shape and the edges are welded together using advanced TIG or Plasma welding techniques to create a solid weld seam.
4.Weld Seam Treatment: The external weld bead is removed to achieve a smooth surface, and the internal bead may be controlled or treated for bore cleanliness.
5.Solution Annealing: A full heat treatment process is applied to dissolve carbides, restore corrosion resistance, and relieve stresses from welding and forming.
6.Sizing & Calibration: The pipe is passed through a sizing mill to achieve the final precise outer diameter and roundness.
7.Straightening: The pipe is straightened to ensure optimal linearity.
8.Pickling & Passivation: Chemical treatment removes scale and impurities, while promoting the formation of a protective passive oxide layer on the surface, including the weld zone.
9.Non-Destructive Testing (NDT): The weld seam is inspected using methods like Eddy Current or Ultrasonic Testing to ensure integrity and quality.
10.Final Inspection & Marking: Each pipe undergoes dimensional checks, visual inspection, and is marked with grade, heat number, and relevant standards before packaging.
This controlled process guarantees a consistent weld seam, excellent dimensional accuracy, and superior corrosion resistance for every batch ofWomic Steel's 304H Welded Steel Pipes.
• Outside Diameter:6mm – 1219mm (1/4" – 48")
• Wall Thickness:0.5mm – 50mm (SCH 5S – SCH XXS)
• Length:Up to 12 meters
• Tolerances: According to ASTM A999 / EN ISO 1127
Standard pipe sizes comply with ANSI B36.19 and ANSI B36.10.
|
ANSI B 36.19/ANSI B36.10 DIMENSIONS OF SEAMLESS &WELDED STAINLESS STEEL PIPE |
|||||||||||||||||||
|
公称尺寸 |
外径 |
ANSI B36.19 |
ANSI B36.10ANSI B36.10 |
||||||||||||||||
|
DN |
NPS |
mm |
5S |
10S |
40S |
80S |
10 |
20 |
30 |
STD |
40 |
60 |
XS |
80 |
100 |
120 |
140 |
160 XXS |
|
|
6 |
1/8" |
10.29 |
|
1.24 |
1.73 |
2.41 |
|
|
|
1.73 |
1.73 |
|
2.41 |
2.41 |
|
|
|
|
|
|
8 |
1/4" |
13.72 |
|
1.65 |
2.24 |
3.02 |
|
|
|
2.24 |
2.24 |
|
3.02 |
3.02 |
|
|
|
|
|
|
10 |
3/8" |
17.15 |
|
1.65 |
2.31 |
3.20 |
|
|
|
2.31 |
2.31 |
|
3.20 |
3.20 |
|
|
|
|
|
|
15 |
1/2" |
21.34 |
1.65 |
2.11 |
2.77 |
3.73 |
|
|
|
2.77 |
2.77 |
|
3.73 |
3.73 |
|
|
|
4.78 |
7.47 |
|
20 |
3/4" |
26.67 |
1.65 |
2.11 |
2.87 |
3.91 |
|
|
|
2.87 |
2.87 |
|
3.91 |
3.91 |
|
|
|
5.56 |
7.82 |
|
25 |
1" |
33.4 |
1.65 |
2.77 |
3.38 |
4.55 |
|
|
|
3.38 |
3.38 |
|
4.55 |
4.55 |
|
|
|
6.35 |
9.09 |
|
32 |
1 1/4" |
42.16 |
1.65 |
2.77 |
3.56 |
4.85 |
|
|
|
3.56 |
3.56 |
|
4.85 |
4.85 |
|
|
|
6.35 |
9.70 |
|
40 |
1 1/2" |
48.26 |
1.65 |
2.77 |
3.68 |
5.08 |
|
|
|
3.68 |
3.68 |
|
5.08 |
5.08 |
|
|
|
7.14 |
10.16 |
|
50 |
2" |
60.33 |
1.65 |
2.77 |
3.91 |
5.54 |
|
|
|
3.91 |
3.91 |
|
5.54 |
5.54 |
|
|
|
8.74 |
11.07 |
|
65 |
2 1/2" |
73.03 |
2.11 |
3.05 |
5.16 |
7.01 |
|
|
|
5.16 |
5.16 |
|
7.01 |
7.01 |
|
|
|
9.52 |
14.02 |
|
80 |
3" |
88.9 |
2.11 |
3.05 |
5.49 |
7.62 |
|
|
|
5.49 |
5.49 |
|
7.62 |
7.62 |
|
|
|
11.13 |
15.24 |
|
90 |
3 1/2" |
101.6 |
2.11 |
3.05 |
5.74 |
8.08 |
|
|
|
5.74 |
5.74 |
|
8.08 |
8.08 |
|
|
|
|
|
|
100 |
4" |
114.3 |
2.11 |
3.05 |
6.02 |
8.56 |
|
|
|
6.02 |
6.02 |
|
8.56 |
8.56 |
|
11.13 |
|
13.50 |
17.12 |
|
125 |
5” |
141.3 |
2.77 |
3.40 |
6.55 |
9.52 |
|
|
|
6.55 |
6.55 |
|
9.52 |
9.52 |
|
12.70 |
|
15.90 |
19.05 |
|
150 |
6" |
168.28 |
2.77 |
3.40 |
7.11 |
10.97 |
|
|
|
7.11 |
7.11 |
|
10.97 |
10.97 |
|
14.30 |
|
18.20 |
21.95 |
|
200 |
8" |
219.08 |
2.77 |
3.76 |
8.18 |
12.70 |
|
6.35 |
7.04 |
8.18 |
8.18 |
10.30 |
12.70 |
12.70 |
15.10 |
18.20 |
20.60 |
23.00 |
22.22 |
|
250 |
10" |
273.05 |
3.40 |
4.19 |
9.27 |
12.70 |
|
6.35 |
7.80 |
9.27 |
9.27 |
12.70 |
12.70 |
15.09 |
18.26 |
21.44 |
25.40 |
28.58 |
|
|
300 |
12" |
323.85 |
3.96 |
4.57 |
9.52 |
12.70 |
|
6.35 |
8.38 |
9.52 |
10.31 |
14.27 |
12.70 |
17.48 |
21.44 |
25.40 |
28.58 |
33.32 |
|
|
350 |
14" |
355.6 |
3.98 |
4.78 |
|
|
6.35 |
7.92 |
9.52 |
9.52 |
11.13 |
15.09 |
12.70 |
19.05 |
23.83 |
27.79 |
31.75 |
35.71 |
|
|
400 |
16" |
406.4 |
4.19 |
4.78 |
|
|
6.35 |
7.92 |
9.52 |
9.52 |
12.70 |
16.66 |
12.70 |
21.44 |
26.19 |
30.96 |
36.53 |
40.49 |
|
|
450 |
18" |
459.2 |
4.19 |
4.78 |
|
|
6.35 |
7.92 |
11.13 |
9.52 |
14.27 |
19.05 |
12.70 |
23.83 |
29.36 |
34.92 |
39.67 |
45.24 |
|
|
500 |
20" |
508 |
4.77 |
5.53 |
|
|
6.35 |
9.52 |
12.70 |
9.52 |
15.09 |
20.62 |
12.70 |
26.19 |
32.54 |
38.10 |
44.45 |
50.01 |
|
|
550 |
22" |
558.8 |
4.77 |
5.53 |
|
|
6.35 |
9.52 |
12.70 |
9.52 |
15.87 |
22.22 |
12.70 |
28.57 |
34.92 |
41.27 |
47.62 |
53.97 |
|
|
600 |
24" |
609.6 |
5.54 |
6.35 |
|
|
6.35 |
9.52 |
14.70 |
9.52 |
17.48 |
24.61 |
12.70 |
30.96 |
38.89 |
46.02 |
52.37 |
59.94 |
|
|
650 |
26" |
660.4 |
|
|
|
|
7.92 |
12.70 |
|
9.52 |
|
|
12.70 |
|
|
|
|
|
|
|
700 |
28" |
711.2 |
|
|
|
|
7.92 |
12.70 |
15.88 |
9.52 |
|
|
12.70 |
|
|
|
|
|
|
|
750 |
30" |
762 |
6.35 |
7.92 |
|
|
7.92 |
12.70 |
15.88 |
9.52 |
|
|
12.70 |
|
|
|
|
|
|
|
800 |
32" |
812.8 |
|
|
|
|
7.92 |
12.70 |
15.88 |
9.52 |
|
|
12.70 |
|
|
|
|
|
|
Womic Steel offers a wide range of surface finishes to meet various industrial, sanitary, and decorative applications.
|
304H Stainless Steel Pipe Surface Type |
304H Stainless Steel Pipe Description |
|
Annealed & Pickled (AP Finish) |
Bright silver appearance after acid treatment, suitable for industrial piping. |
|
Bright Annealed (BA Finish) |
Mirror-like surface obtained through controlled atmosphere annealing. |
|
Polished Finish (180#, 240#, 320#, 400#, 600#) |
Smooth mechanical finish suitable for decorative and architectural use. |
|
Mirror Polished (8K) |
Ultra-reflective surface ideal for sanitary and high-end design. |
|
Brushed / Hairline Finish |
Satin linear texture for furniture and interior design. |
|
Passivated Finish |
Surface chemically treated to enhance corrosion protection. |
|
Electropolished Finish |
Extremely clean, smooth, and hygienic finish ideal for food and pharmaceutical equipment. |
Each 304H Stainless Steel Pipe surface is inspected for uniform gloss, absence of pits, and consistent finish quality.
Every 304H Stainless Steel Pipe undergoes comprehensive inspection in accordance with ASTM, EN, and GB standards to guarantee reliability and performance:
Visual & Dimensional Inspection: Surface, roundness, and thickness checked.
Hydrostatic Pressure Test: 100% tested for leakage and pressure resistance.
Eddy Current Test: Detects surface and sub-surface imperfections.
Ultrasonic Test (UT): Ensures internal integrity of the seamless structure.
Positive Material Identification (PMI): Confirms correct chemical grade of 304H Stainless Steel Pipe.
Intergranular Corrosion Test (IGC): Validates resistance to sensitization.
Flattening & Flaring Tests: Evaluate ductility and deformation capability.
Hardness & Tensile Testing: Confirms mechanical compliance with ASTM standards.
Surface Roughness and Cleanliness Check: For sanitary or polished tubes.
Third-Party Inspection (SGS / BV / TUV): Available upon customer request.
These extensive tests ensure that every 304H Stainless Steel Pipe from Womic Steel meets the highest international standards for reliability and longevity.
304H Stainless Steel Pipe is widely used in industries requiring reliable high-temperature performance and oxidation resistance:
304H Stainless Steel Pipe for Power Generation Industry: Boiler tubes, superheater tubes, and high-temperature steam pipelines.
304H Stainless Steel Pipe for Petrochemical Industry: Process piping, refinery equipment, and high-temperature reactors.
304H Stainless Steel Pipe for Heat Exchanger Systems: Boilers, condensers, heaters, and thermal equipment.
304H Stainless Steel Pipe for Furnace and Thermal Equipment: High-temperature structural piping and furnace components.
304H Stainless Steel Pipe for Oil and Gas Industry: High-temperature processing pipelines and refinery systems.
304H Stainless Steel Pipe for Chemical Processing Plants: Acid-resistant piping systems exposed to elevated temperature environments.
304H Stainless Steel Pipe for Industrial Heating Systems: Heat transfer pipelines and industrial heating installations.
Each 304H Stainless Steel Pipe is securely packed and clearly labeled to ensure safe and efficient transport worldwide.
General packaging: Bundle packing with woven fabric, iron strip bundle, plastic cap on two ends for local truck transport.
Hexagonal packaging: Bundle packing with woven fabric, iron strip bundle, plastic cap on two ends for local truck transport.
Packaging of welded pipe in medium and large sizes: Wrapped with woven fabric by automatic packaging for export sea-worthy transport.
Packaging for medium and large size welded pipes to be exported: Wooden or steel crate packaging for export sea-worthy transport.
General packaging for products to be exported: Wooden box for export sea-worthy transport.
Packaging of condensation pipe and low-pressure heater tube: Wooden box for local truck and export sea-worthy transport.
Womic Steel’s Shipping and Delivery Strengths on 304H Stainless Steel Pipe:
1. Direct cooperation with global shipowners ensures the most competitive freight rates.
2. Professional loading and securing teams guarantee damage-free shipment.
3. Efficient document preparation, minimizing customs delays.
4. Rapid delivery time — standard sizes kept in ready stock more than 10,000tons.
5. Continuous cargo tracking and after-sales follow-up to ensure smooth arrival at destination.
Womic Steel is a trusted manufacturer and exporter specializing in304H Stainless Steel Pipe, committed to delivering premium quality and professional service.
Strict quality control under ISO and PED certification.
Modern production lines and experienced technicians.
Complete testing, inspection, and documentation support.
Flexible customization and surface finishing options.
Fast production cycle and reliable global shipping.
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