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Products & Solutions
Stainless Precision Tubes
Stainless Precision Tubes
Stainless Precision Tubes
1) Overview
Stainless steel seamless precision tubes manufactured by cold drawing/rolling with solution treatment (BA/MA). Dedicated to small OD, thin wall, and tight tolerances. They deliver superior dimensional accuracy, high cleanliness inside/outside, excellent concentricity and straightness, and ultra-low leak rates—ideal for instrumentation, automotive & NEV, medical devices, pneumatic/hydraulic micro-lines, and semiconductor/analytical equipment.
2) Key Features
•Tight tolerances: OD/WT/ID to project specs (typical OD tolerance down to ±0.02–0.05 mm).
•Clean & smooth: BA finish and EP available; inner roughness Ra ≤ 0.2 μm (EP).
•Concentric & straight: Typical straightness ≤ 0.15 mm/m.
•Leak-tight: 100% eddy current and/or leak testing; helium leak testing on request.
•Degreased/oil-free: Cleaned and clean-room packaging for analytical/semiconductor lines.
•Custom options: Cut-to-length, end finishing (chamfer/flaring), bundle or coil supply.
3) Standards
•ASTM A269, ASTM A632 (small-diameter austenitic stainless precision tubes)
•ASTM A213 (high-temperature heat exchanger/boiler tubes, adapted to precision tolerance)
•EN 10216-5 (TC1/TC2) (seamless stainless tubes, supplied with precision tolerance)
•GB/T 13296, GB/T 14976 (seamless stainless tubes, precision-grade supply)
Note: For applications such as medical, analytical, or UHP gas lines, additional requirements (degreasing, EP, particle & residue limits) may be added.
4) Size Range (Small-OD Focus)
•OD: φ0.8–25.4 mm (other sizes on request)
•WT: 0.05–2.0 mm (typical range, customizable per project)
•Length: ≤ 6,000 mm fixed; coils (tens of meters/coil) available
•Straightness: Typical ≤ 0.15 mm/m (tighter on request)
•Ends: Plain, chamfered, deburred, flared, or expanded
Materials (Selected):
•304 / 304L, 316 / 316L, 321, 310S, 904L
•Duplex: 2205 (on request)
Note: For nickel-based or special alloy precision tubes, separate project discussion required.
5) Typical Applications
•Instrumentation: Pressure/flow/chromatography lines, sampling systems, precision measurement tubes.
•Automotive & NEV: Fuel injection micro-tubes, EGR/after-treatment, cooling and thermal management micro-channels.
•Medical Devices: Minimally invasive instruments, catheter bodies, hypodermic/micro-capillary tubes (per regulatory cleanliness).
•Analytical & Lab: GC/LC/ICP equipment gas/liquid lines; oil-free, low-extractables tubing.
•Semiconductor & Electronics: High-purity gas delivery, vacuum system connections (UHP cleaning & double-bag packaging available).
•Pneumatic/Hydraulic Micro-Lines: Fast-response, low-leak, corrosion-resistant small-diameter tubes.
Not included on this page: large-diameter, thick-wall, or long-distance fluid transport pipes.
6) Quality & Testing
•Chemical/Mechanical: Per standards & order (C, S, P, δ-Ferrite, tensile/yield/elongation)
•Dimensional & Geometric: 100% dimensional check, full-project inspection optional
•NDT: Eddy current, flux leakage, ultrasonic (depending on size & wall)
•Pressure/Leak: Pneumatic/hydrostatic/helium leak tests (on request)
•Cleanliness: Degreasing, particle & hydrocarbon residue limits (third-party reports available)
•Surface: BA/EP/mechanical polishing (grit grades available)
7) Supply & Packaging
•Forms: Straight lengths (fixed) / Coils
•Packaging: Individual clean bags + end caps, bundled in crates; EP/UHP double-bagged and vacuum sealed available
•Traceability: Full heat/batch traceability with MTC (EN 10204 3.1/3.2)
8) Ordering Guide
•Material/Standard (e.g., 316L / ASTM A269)
•Size (OD × WT × Length; or ID-focused tolerance)
•Tolerance grade (OD/WT/ID, straightness/concentricity)
•Surface & Cleanliness (BA/EP, degreased/oil-free, particle/residue limits)
•Testing (NDT type, pneumatic/helium leak, third-party witness)
•Form (fixed length or coil) and packaging grade (standard/cleanroom)
9) Why Us
•Strong in small OD & thin-wall: Stable production of φ0.8–6 mm ultra-thin wall; excellent concentricity.
•Surface & cleanliness: Mature BA & EP processes, serving analytical & semiconductor customers.
•One-stop customization: From alloy selection, process windows to end-forming/assembly co-development.
•Reliable delivery: Safety stock for key sizes, controlled project cycles.
•Complete documentation: MTC + reports on cleanliness, Ra, leak-rate (on request).
1.4301 EN 10216 – 05
OD Tolerance: +/- 0.08, +/-0.05mm
WT Tolerance: -0/+10%
Ra ≤ 6.3 um
2.SPC Chart – Fuel Rail Tube (OD)
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