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Products & Solutions
Seamless Pipes & Tubes
Seamless Pipes & Tubes
Stainless Steel Seamless Pipes & Tubes
1) Overview
Stainless steel seamless pipes are produced by piercing hot rolling, hot extrusion, cold rolling/drawing, followed by solution annealing.
They feature high strength, corrosion resistance, high-temperature and high-pressure service capability, and are widely used in petrochemical, boilers & heat exchangers, nuclear, aerospace, food & pharmaceutical, and mechanical applications.
2) Manufacturing Process
•Raw material: stainless steel billets
•Piercing & hot rolling: forming hollow shells
•Hot extrusion / cold rolling / cold drawing: achieving required size & thickness
•Heat treatment: solution annealing (BA/MA condition)
•Straightening & cutting: ensuring dimensional accuracy & surface quality
•Final testing: eddy current, ultrasonic, chemical & mechanical tests
3) Key Features
•High strength & toughness: suitable for high temperature, high pressure, and corrosive environments
•Seamless structure: smooth inner/outer surfaces, reduced leakage risk
•Excellent corrosion resistance: resistant to acids, alkalis, and chlorides (e.g., 316L, 2205)
•Dimensional accuracy: tight tolerances with cold drawn/rolled production
•Delivery conditions: annealed, solution annealed, bright annealed (BA)
4) Standards
Stainless steel only:
•ASTM/ASME: A213, A269, A312, A376, A511, A789, A790
•EN/DIN: EN 10216-5 (TC1/TC2), DIN 17456, DIN 17458
•JIS: JIS G3459, JIS G3463
•GB/T: GB/T 13296, GB/T 14976
5) Grades
•Austenitic SS: 304, 304L, 316, 316L, 321, 310S, 347H
•Duplex SS: 2205, 2507
•Super Austenitic: 904L, 254SMo
•Heat Resistant SS: 309S, 310S
6) Applications
•Petrochemical: corrosion-resistant piping, heat exchanger & reactor tubes
•Energy & Power: boiler tubes, nuclear steam generator tubing, condenser tubes
•Machinery & Automotive: hydraulic lines, bearing sleeves, precision components
•Food & Pharmaceutical: hygienic piping, sterile lines
•Aerospace: engine tubing, hydraulic systems, high-temperature components
•Marine & Offshore: LNG systems, seawater-resistant piping, offshore platforms
7) Quality & Testing
•Chemical composition (spectrometer, C & S analysis)
•Mechanical properties (tensile, hardness, impact)
•Dimensional accuracy (OD, WT, straightness)
•NDT: eddy current, ultrasonic, radiographic
•Pressure testing: hydrostatic, pneumatic, helium leak (on request)
•Surface inspection: pickling, roughness, visual check
•Third-party certification: TÜV, LR, BV, ABS, SGS
8) Supply & Packaging
•Supply forms: fixed/random lengths, straight pipes or coils
•Ends: Plain End (PE), Beveled End (BE), Threaded (NPT)
•Packaging: plastic end caps, waterproof wrapping, wooden cases, steel frames
•Traceability: MTC (EN 10204 3.1/3.2), full heat/batch number traceability
9) Ordering Guide
•Grade & standard (e.g., 316L / ASTM A312)
•Dimensions (OD × WT × Length)
•Surface finish (pickled, BA, polished)
•Testing requirements (NDT type, hydro/pneumatic test)
•Packaging (wooden cases, steel frames, anti-rust export packing)
•Special service (food-grade, UHP, nuclear)
10) Why Us
•Complete range: Austenitic, Duplex, Super Austenitic stainless seamless pipes
•High-performance: capable of handling high pressure, temperature & corrosive environments
•Global standards: ASTM, EN, JIS, GB/T compliance
•Strict QC: full inspection and third-party certifications available
•Integrated supply: plates, bars, fittings, flanges for EPC & industrial projects
1. Main steel types and typical grades:
|
Item No.
|
Steel types
|
(AISI) Typical steel codes
|
|
1
|
Austenite
|
301, 310S, 304, 304L, 304H, 316, 316L, 316Ti,
317, 317L, 321, 321H, 347H, 904L |
|
2
|
Duplex
|
S31803, S32205, S31500, S31750,
S31760, S31900, S32304 |
|
3
|
Incoloy
|
800, 800H, 800HT, 825, 901, 925, 926
|
|
4
|
Inconel
|
600, 601, 625, 718
|
|
5
|
Monel
|
400, K500
|
|
6
|
Nickel base, Fe base and pure nickel
|
UNS N04400, N06600, N06601, N06617, N06625, N06600, N06690, N10276, N08800, N08020, N08825, N08801, N08811; N4, N6, Nickel 200, Nickel 201
|
|
7
|
Hastelloy
|
B, B-2, C-4, C-22, C-276
|
2. Main Production Standard:
|
Item No.
|
Standard type
|
Standard
|
|
Stainless steel seamless pipes & tubes(Cold drawn, Cold rolled, Bright precision)
|
EN
|
EN 10216-5, EN 10216-2
|
|
DIN
|
DIN 17456, DIN 17458
|
|
|
ASTM/ASME
|
A213, A269, A511, A789, A790, A335, A376
SA213, SA312, SA789, SA790, SA335, SA376 SB161, SB163, SB167, SB338, SB668, SB677 |
|
|
JIS
|
JIS G3459, G3463
|
|
|
GB
|
GB/T 14975, T14976, GB13296, GB5310,GB9948
|
3. Production specification:
|
Item No.
|
Products
|
Specification
|
|
1
|
Cold drawn pipes & tubes
|
(OD) φ6 - φ1016 mm, (WT) φ1 - φ50.01mm
|
|
2
|
Cold rolled pipes & tubes
|
(OD) φ16 - φ325 mm, (WT) φ1 - φ30mm
|
|
Products
|
Diameter(mm)
|
Thickness(mm)
|
Length(m)
|
|
Stainless steel seamless pipes & tubes(Cold drawn, Cold rolled, Bright precision)
|
6 - 20
|
0.8 - 3.5
|
Max: 240
|
|
20 - 32
|
1.5 - 8
|
Max: 24
|
|
|
32 - 159
|
1.5 - 35
|
Max: 12
|
|
|
168 - 325
|
3 - 40
|
Max: 12
|
|
|
325 - 830
|
5.5 - 45
|
Max: 8.5
|
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