China Stainless Steel

stainless steel
sanitary pipe & tube

Stainless steel pipe & tube is all we do. TeCarve supplies ASTM A270 / ISO 2037 sanitary tube in 304, 304L and 316L from its two partner factories in Foshan & Wenzhou — mechanical polish 180–400 grit or electropolished (Ra ≤ 0.38 µm), Ra measured and reported per order, and an EN 10204 3.1 MTC with every shipment.

Mirror-polished stainless sanitary tube ends
Hygienic Precision

Hygienic Precision: Controlled Ra Finishes & Full Batch Traceability for Food, Dairy & Beverage Lines.

1
Mechanical & Electropolished Ra Finishes (180–400 Grit): Ra verified and documented per order.
2
ASTM A270 / ISO 2037 Compliance in 304 & 316L: heat traceability, batch PMI chemical testing, and standard EN 10204 3.1 MTC.
3
Trial Orders from 100–300 kg: supports pilot production, equipment repairs, and matched 316L sanitary clamp fittings.
MOQStandard sanitary tubing from 100–300 kg (trial orders welcomed).
Lead TimeIn-stock standard sizes 7–10 days; custom fabrication 10–25 days.
SamplesFree standard samples dispatched within 48 hours (freight collect).
DocumentsStandard EN 10204 3.1 MTC; 3.2 / TPI (SGS, BV, TÜV) on request.

Specifications

Available Sizes by Standard & Dimensional Tolerance Matrix

Application Scope: N. America & Global — Bioprocessing, pharmaceutical & high-purity process lines (Part DT)

Size (in)OD (in / mm)Wall Thickness (in / mm)OD ToleranceWall ToleranceSurface Finish (Part SF)
1/4"0.250" (6.35 mm)0.035" (0.89 mm)±0.005" (±0.13 mm)±10%SF1 (Ra ≤ 20μin / 0.51μm) | SF4 (Ra ≤ 15μin / 0.38μm EP)
3/8"0.375" (9.53 mm)0.035" (0.89 mm)±0.005" (±0.13 mm)±10%SF1 (Ra ≤ 20μin / 0.51μm) | SF4 (Ra ≤ 15μin / 0.38μm EP)
1/2"0.500" (12.70 mm)0.065" (1.65 mm)±0.005" (±0.13 mm)±10%SF1 (Ra ≤ 20μin / 0.51μm) | SF4 (Ra ≤ 15μin / 0.38μm EP)
3/4"0.750" (19.05 mm)0.065" (1.65 mm)±0.005" (±0.13 mm)±10%SF1 (Ra ≤ 20μin / 0.51μm) | SF4 (Ra ≤ 15μin / 0.38μm EP)
1"1.000" (25.40 mm)0.065" (1.65 mm)±0.005" (±0.13 mm)±10%SF1 (Ra ≤ 20μin / 0.51μm) | SF4 (Ra ≤ 15μin / 0.38μm EP)
1 1/2"1.500" (38.10 mm)0.065" (1.65 mm)±0.008" (±0.20 mm)±10%SF1 (Ra ≤ 20μin / 0.51μm) | SF4 (Ra ≤ 15μin / 0.38μm EP)
2"2.000" (50.80 mm)0.065" (1.65 mm)±0.008" (±0.20 mm)±10%SF1 (Ra ≤ 20μin / 0.51μm) | SF4 (Ra ≤ 15μin / 0.38μm EP)
2 1/2"2.500" (63.50 mm)0.065" (1.65 mm)±0.010" (±0.25 mm)±10%SF1 (Ra ≤ 20μin / 0.51μm) | SF4 (Ra ≤ 15μin / 0.38μm EP)
3"3.000" (76.20 mm)0.065" (1.65 mm)±0.010" (±0.25 mm)±10%SF1 (Ra ≤ 20μin / 0.51μm) | SF4 (Ra ≤ 15μin / 0.38μm EP)
4"4.000" (101.60 mm)0.083" (2.11 mm)±0.015" (±0.38 mm)±10%SF1 (Ra ≤ 20μin / 0.51μm) | SF4 (Ra ≤ 15μin / 0.38μm EP)
6"6.000" (152.40 mm)0.109" (2.77 mm)±0.030" (±0.76 mm)±10%SF1 (Ra ≤ 20μin / 0.51μm) | SF4 (Ra ≤ 15μin / 0.38μm EP)

Nominal OD tube sizes per ASME BPE Part DT (Table DT-4-1 in BPE-2026); tubing tolerances per ASTM A270 including Supplementary Requirement S2, as referenced by ASME BPE DT-7.2. Material 316L / 1.4404 with controlled sulfur (0.005%–0.017%) for orbital automatic welding.

  • Supply Length / Form: Fixed lengths 1–12 m (3, 6, or 6.5 m standard); custom cut lengths and spool integration available
  • Available Grades: 304, 304L, 316, 316L, 1.4301, 1.4404 (controlled sulfur 0.005%–0.017% available for automated orbital welding)
  • Surface Finish Options: Mill finish, Bright Annealed (BA), Mechanical Polish (Ra ≤ 0.8μm down to ≤ 0.4μm), or Electropolished (ASME BPE SF4 Ra ≤ 0.38μm / 15μin)
  • Testing & Documentation: EN 10204 3.1 Mill Test Certificate (MTC), Eddy Current / Hydrostatic test, dimensional CMM inspection, and Ra profilometer verification included

Application Scope: Europe & International — Stainless steel tubes for food, dairy, brewery & chemical industries

Size (DN)Series 1 / Reihe 1 (OD × WT, tolerances, weight)Series 2 / Reihe 2 [most common] (OD × WT, tolerances, weight)
DN 1012 × 1.0 mm (OD ±0.1, WT ±0.1; 0.27 kg/m)13 × 1.5 mm (OD ±0.1, WT ±0.15; 0.43 kg/m)
DN 1518 × 1.0 mm (OD ±0.1, WT ±0.1; 0.42 kg/m)19 × 1.5 mm (OD ±0.1, WT ±0.15; 0.66 kg/m)
DN 2022 × 1.0 mm (OD ±0.11, WT ±0.1; 0.51 kg/m)23 × 1.5 mm (OD ±0.12, WT ±0.15; 0.81 kg/m)
DN 2528 × 1.0 mm (OD ±0.14, WT ±0.1; 0.66 kg/m)29 × 1.5 mm (OD ±0.15, WT ±0.15; 1.03 kg/m)
DN 3234 × 1.0 mm (OD ±0.17, WT ±0.1; 0.82 kg/m)35 × 1.5 mm (OD ±0.18, WT ±0.15; 1.26 kg/m)
DN 4040 × 1.0 mm (OD ±0.2, WT ±0.1; 0.97 kg/m)41 × 1.5 mm (OD ±0.21, WT ±0.15; 1.5 kg/m)
DN 5052 × 1.0 mm (OD ±0.26, WT ±0.1; 1.26 kg/m)53 × 1.5 mm (OD ±0.27, WT ±0.15; 1.9 kg/m)
DN 65—70 × 2.0 mm (OD ±0.35, WT ±0.2; 3.43 kg/m)
DN 80—85 × 2.0 mm (OD ±0.43, WT ±0.2; 4.16 kg/m)
DN 100—104 × 2.0 mm (OD ±0.78, WT ±0.2; 5.03 kg/m)
DN 125—129 × 2.0 mm (OD ±0.97, WT ±0.2; 6.36 kg/m)
DN 150—154 × 2.0 mm (OD ±1.16, WT ±0.2; 7.49 kg/m)
DN 200—204 × 2.0 mm (OD ±1.53, WT ±0.2; 10.12 kg/m)

Dimensions, tolerances (mm) and weights per DIN 11850:2009-06 Table 1; OD tolerance includes out-of-roundness; straightness 0.005 × L and max. 2 mm per metre. DIN 11850:2009 has two series only and has been superseded by EN 10357 (2014). Preferred connections listed in the standard: DIN 11851 unions, DIN 11853 hygienic unions/flanges/clamps and DIN 32676 clamps. Standard grades: 1.4301, 1.4307, 1.4404, 1.4432.

  • Supply Length / Form: Fixed lengths 1–12 m (3, 6, or 6.5 m standard); custom cut lengths and spool integration available
  • Available Grades: 304, 304L, 316, 316L, 1.4301, 1.4404 (controlled sulfur 0.005%–0.017% available for automated orbital welding)
  • Surface Finish Options: Mill finish, Bright Annealed (BA), Mechanical Polish (Ra ≤ 0.8μm down to ≤ 0.4μm), or Electropolished (ASME BPE SF4 Ra ≤ 0.38μm / 15μin)
  • Testing & Documentation: EN 10204 3.1 Mill Test Certificate (MTC), Eddy Current / Hydrostatic test, dimensional CMM inspection, and Ra profilometer verification included

Application Scope: N. America — Sanitary tube for food, dairy & pharmaceutical processing

OD (mm)WT (mm)OD Tol.WT Tol.
12.71.65±0.13mm±12.5%
19.051.65±0.13mm±12.5%
25.401.65±0.13mm±12.5%
38.101.65±0.20mm±12.5%
38.102.11±0.20mm±12.5%
50.801.65±0.20mm±12.5%
50.802.11±0.20mm±12.5%
63.502.11±0.25mm±12.5%
76.202.11±0.25mm±12.5%
76.202.77±0.25mm±12.5%
101.602.11±0.38mm±12.5%
152.402.77±0.75mm±12.5%

Per ASTM A270/A270M-23 Table 2: OD tolerance is a flat, symmetric value keyed to nominal OD size. Wall thickness tolerance is ±12.5%.

  • Supply Length / Form: Fixed lengths 1–12 m (3, 6, or 6.5 m standard); custom cut lengths and spool integration available
  • Available Grades: 304, 304L, 316, 316L, 1.4301, 1.4404 (controlled sulfur 0.005%–0.017% available for automated orbital welding)
  • Surface Finish Options: Mill finish, Bright Annealed (BA), Mechanical Polish (Ra ≤ 0.8μm down to ≤ 0.4μm), or Electropolished (ASME BPE SF4 Ra ≤ 0.38μm / 15μin)
  • Testing & Documentation: EN 10204 3.1 Mill Test Certificate (MTC), Eddy Current / Hydrostatic test, dimensional CMM inspection, and Ra profilometer verification included

Application Scope: Europe — Welded tube for food & chemical industries (Series A / B / C / D)

OD (mm)WT (mm)OD Tol.WT Tol.
10.01.0±0.15mm (±1.5%)±0.10mm (±10.0%)
13.01.5±0.15mm (±1.2%)±0.15mm (±10.0%)
19.01.5±0.15mm (±0.8%)±0.15mm (±10.0%)
23.01.5±0.15mm (±0.7%)±0.15mm (±10.0%)
29.01.5±0.15mm (±0.5%)±0.15mm (±10.0%)
35.01.5±0.15mm (±0.4%)±0.15mm (±10.0%)
41.01.5±0.15mm (±0.4%)±0.15mm (±10.0%)
53.01.5±0.30mm (±0.6%)±0.15mm (±10.0%)
70.02.0±0.30mm (±0.4%)±0.20mm (±10.0%)
85.02.0±0.30mm (±0.4%)±0.20mm (±10.0%)
104.02.0±0.30mm (±0.3%)±0.20mm (±10.0%)
129.02.0±0.30mm (±0.2%)±0.20mm (±10.0%)

EN 10357 Series A corresponds directly to DIN 11850 Series 2.

  • Supply Length / Form: Fixed lengths 1–12 m (3, 6, or 6.5 m standard); custom cut lengths and spool integration available
  • Available Grades: 304, 304L, 316, 316L, 1.4301, 1.4404 (controlled sulfur 0.005%–0.017% available for automated orbital welding)
  • Surface Finish Options: Mill finish, Bright Annealed (BA), Mechanical Polish (Ra ≤ 0.8μm down to ≤ 0.4μm), or Electropolished (ASME BPE SF4 Ra ≤ 0.38μm / 15μin)
  • Testing & Documentation: EN 10204 3.1 Mill Test Certificate (MTC), Eddy Current / Hydrostatic test, dimensional CMM inspection, and Ra profilometer verification included

Application Scope: Japan & Asia-Pacific — Stainless steel sanitary pipe for food processing

OD (mm)WT (mm)OD Tol.WT Tol.
12.71.0±0.30mm (±2.4%)±0.13mm (±12.5%)
19.051.0±0.30mm (±1.6%)±0.13mm (±12.5%)
25.401.2±0.30mm (±1.2%)±0.15mm (±12.5%)
31.801.2±0.30mm (±0.9%)±0.15mm (±12.5%)
38.101.2±0.29mm (±0.75%)±0.15mm (±12.5%)
50.801.5±0.38mm (±0.75%)±0.19mm (±12.5%)
63.501.5±0.48mm (±0.75%)±0.19mm (±12.5%)
76.302.0±0.57mm (±0.75%)±0.25mm (±12.5%)
101.602.0±0.76mm (±0.75%)±0.25mm (±12.5%)

Standard metric sizing widely used throughout Japan and Southeast Asian sanitary projects.

  • Supply Length / Form: Fixed lengths 1–12 m (3, 6, or 6.5 m standard); custom cut lengths and spool integration available
  • Available Grades: 304, 304L, 316, 316L, 1.4301, 1.4404 (controlled sulfur 0.005%–0.017% available for automated orbital welding)
  • Surface Finish Options: Mill finish, Bright Annealed (BA), Mechanical Polish (Ra ≤ 0.8μm down to ≤ 0.4μm), or Electropolished (ASME BPE SF4 Ra ≤ 0.38μm / 15μin)
  • Testing & Documentation: EN 10204 3.1 Mill Test Certificate (MTC), Eddy Current / Hydrostatic test, dimensional CMM inspection, and Ra profilometer verification included

Surface Roughness (Ra) Control & Hygienic Finish Standards

In sanitary and aseptic process systems, inner bore surface roughness dictates microbial cleanability, CIP rinse efficiency, and resistance to biofilm adhesion. TeCarve provides strictly controlled internal finishes tailored to your engineering specifications:

Mechanical Polish (Sanitary Grade)Precision 320–400 grit mechanical polishing achieving internal Ra ≤ 0.8μm (32μin) for standard food/dairy transfer, down to Ra ≤ 0.4μm (16μin) for premium hygienic processing.
Electropolishing — ASME BPE SF4Anodic dissolution achieving internal Ra ≤ 0.38μm (15μin) down to ≤ 0.25μm (10μin), eliminating micro-crevices and optimizing Cr/Fe surface oxide ratios for biopharm WFI systems.

Weld Bead Treatment & Profilometer Inspection: Welded sanitary tubes undergo internal weld bead planishing (cold rolling flush to parent tube wall) to eliminate fluid traps. Ra roughness is measured along longitudinal tracks using calibrated contact stylus profilometers and recorded on the EN 10204 3.1 Inspection Certificate.

Quality Assurance & Compliance Boundary: TeCarve operates quality management systems certified to ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 (Shanghai Ingeer Certification Assessment Co., Ltd.). Tubing is manufactured to strictly conform with ASME BPE, DIN 11850, ASTM A270, and ISO 2037 product standard requirements.

Surface Finish & Ra Specifications

Typical maximum Ra; measured and reported per order.

Surface Finish / Process Target Surface Typical Max Ra (μm) Typical Max Ra (μin) Measurement & Reporting
180 Grit Mechanical PolishID / OD≤ 0.80 μm32 μinRoughness tester report per order
240 Grit Mechanical PolishID / OD≤ 0.60 μm24 μinRoughness tester report per order
320 Grit Mechanical PolishID / OD≤ 0.50 μm20 μinRoughness tester report per order
400 Grit Mechanical PolishID / OD≤ 0.40 μm15 μinRoughness tester report per order
Bright Annealed (BA)ID Internal Wall≤ 0.80 μm (Precision drawn ≤ 0.40 μm)32 μin (Precision ≤ 16 μin)Roughness tester report per order
Electropolished (EP)ID / Process Wetted≤ 0.38 μm15 μinRoughness tester report per order
Pharma-grade low-sulfur (ASTM A270 S2)

S 0.005–0.017%. Made to order (normally no stock), MOQ 2–3 t per size, lead time 35–45 days including cold rolling/drawing, bright annealing, ID/OD polishing and clean packaging inspection.

Hygienic Tubing & Rapid Quotation

Get Your Sanitary Tubing Quote

Sourcing hygienic stainless steel tubing for dairy, food & beverage, biotechnology, or pharmaceutical processing lines? Contact our technical sales desk for surface roughness options (Ra ≤ 0.8 μm / 0.4 μm EP), custom orbital cut lengths, and low-risk trial orders (100–300 kg MOQ supported).

✨ Hygienic Bore Assurance

Mechanically polished (Ra ≤ 0.8 μm) or electropolished (Ra ≤ 0.4 μm) bore finishes verified with calibrated profilometers.

🔬 Sample Tube Pieces

Short tube samples available for roughness measurement, hygienic weld-head orbital fitting, and visual inspection.

⚖️ 100–300 kg Pilot Runs

Validate orbital welding programs, tube expansion, or plant pilot setups with low-MOQ trial orders before full installation runs.

📋 Complete 3.1 Certification

Fully traceable EN 10204 3.1 test certs covering heat analysis, dimensional tolerances (3A/DIN/ASME BPE), and non-destructive testing.

Have sanitary tubing schedules or finish requirements ready for review?
Chat directly on WhatsApp or submit your RFQ to sales@tecarve.com:

Standards

→ Scroll right for full chemistry & mechanical data

GradeUS (UNS)EN (W.Nr.)Japan (JIS)China (GB/T)C % (Max)Si % (Max)Mn % (Max)P % (Max)S % (Max)Cr %Ni %Mo %Tensile σb (Min.)Yield σ0.2 (Min.)Elongation (Min.)Hardness (Max)
304S304001.4301SUS30406Cr19Ni100.080.752.000.0450.03018.0-20.08.0-11.0—515 MPa (75 ksi)205 MPa (30 ksi)35%≤92 HRB / ≤215 HV
304LS304031.4307SUS304L022Cr19Ni100.0300.752.000.0450.03018.0-20.08.0-12.0—485 MPa (70 ksi)170 MPa (25 ksi)35%≤92 HRB / ≤215 HV
316S316001.4401SUS31606Cr17Ni12Mo20.080.752.000.0450.03016.0-18.010.0-14.02.0-3.0515 MPa (75 ksi)205 MPa (30 ksi)35%≤95 HRB / ≤215 HV
316LS316031.4404SUS316L022Cr17Ni12Mo20.0300.752.000.0450.03016.0-18.010.0-14.02.0-3.0485 MPa (70 ksi)170 MPa (25 ksi)35%≤95 HRB / ≤215 HV
321S321001.4541SUS32106Cr18Ni11Ti0.080.752.000.0450.03017.0-19.09.0-12.0—515 MPa (75 ksi)205 MPa (30 ksi)35%≤95 HRB / ≤215 HV
  • Standards Conformance: ASTM A270 · EN 10357 · DIN 11850 · JIS G3447
  • Delivery Condition: Solution Annealed & Pickled (AP) / Bright Annealed (BA) / Polished, or as requested.
  • Mill Test Certificate: 100% full material traceability with EN 10204 3.1 MTC provided with every shipment.

Features

• Hygienic smooth surface

• Superior corrosion resistance

• Compatible with CIP/SIP systems

• Low maintenance and long service life

• Food and dairy processing systems

• Pharmaceutical and biotech fluid handling

• Brewery and beverage pipelines

• Cleanroom and lab-grade installations

Applications

For high-purity food, dairy, and biopharma installations, see how to verify our sanitary tube manufacturing, internal Ra polishing, cleanroom packing, and mill certifications through a full factory audit.

Quality Control

• Ra surface roughness measured and reported

• 100% visual and dimensional inspection

• Weld bead treatment and polishing

• Pressure, hydrostatic, and eddy current testing available

packaging

PVC Wrapping
& End Caps

Custom Barcoding
& Labeling

Anti-Corrosion
& Moisture Protection

Seaworthy Wooden Cases & Pallets

Tailored Solutions, Timely Fulfillment

CUSTOMIZATION
& DELIVERY

Flexible Custom Manufacturing

We customize stainless steel sanitary pipe and tube by diameter, wall thickness, length, seamless or welded construction, and mirror-polished, bright-annealed, or electro-polished surface requirements, including specified internal roughness.

Low MOQ & Rapid Prototyping

MOQ is as low as 100–300 kg for flexible trial orders, with small batch customization and sample production supported, helping you shorten your development cycle and market entry.

Optimized Lead Time

In-stock standard sizes ship within 7–10 days. Custom specifications typically ship within 10–25 days after deposit, depending on order volume, dimensions, and surface finish. The full cycle—from inquiry and drawing confirmation through sampling, production, inspection, and dispatch—typically takes 33–55 days for custom items.

Global Logistics & On-Time Delivery

For sanitary tube exports worldwide, we prioritize PVC wrapping and end caps plus anti-corrosion and moisture protection to maintain clean finished surfaces.

How your order is made, checked and shipped

1Forming stands on a welded stainless tube mill

Tube forming at the partner factory

2Annealing furnace at operating temperature

Heat treatment (annealing)

3Caliper measuring polished tube outside diameter

Dimensional inspection

4Handheld alloy analyzer screen showing a chemical composition result

Alloy verification with a handheld analyzer

5Tubes in kraft paper with blue end caps in a lined case

Export packing

6Tube bundles in woven bags loaded in a container

Container loading

Verified Client Feedback

Direct excerpts from international buyers receiving our stainless steel tube shipments.

“I've received the goods and everything is fine.”

— Tommy, Nigeria

“The goods already send to customers. I am waiting for the next order from them.”

— Khalid, Indonesia

“…there is no need of inspection this time… I trust in your product.”

— Carmen, Chile

Frequently Asked Questions

What surface finish is required for sanitary stainless steel tube?

Food-grade sanitary service requires Ra ≤ 0.8 µm (32 µin) internal surface roughness; pharmaceutical/biotech service requires Ra ≤ 0.4 µm (16 µin). TeCarve confirms surface finish values on inspection reports supplied with each order.

Which stainless steel grades are used for sanitary tubing?

Grade 316L is the preferred material for sanitary tubing due to its superior resistance to CIP cleaning chemicals, hot water, and chlorides. Grade 304 is used where chemical exposure is minimal. Both are suitable for food-contact use under applicable regulations (e.g., EU Regulation 1935/2004); specific certification requirements should be confirmed per project.

What standards do TeCarve sanitary stainless steel tubes conform to?

Our sanitary tubes conform to international dimensional and hygienic piping standards including DIN 11850 (European hygienic), SMS 1145 (Scandinavian), ISO 2037, and ASTM A270, with dimensional and surface preparation options designed to align with common industry practices (including 3-A sanitary guidelines). Tri-clamp, butt-weld, and plain ends are available in standard and custom sizes.

What industries require sanitary stainless steel pipe?

Sanitary stainless steel pipe is essential in dairy and milk processing, food and beverage manufacturing, pharmaceutical and biotech production, cosmetics, and any hygienic process using CIP (Clean-In-Place) or SIP (Steam-In-Place) systems.

Can TeCarve supply sanitary fittings and clamps to match the tubes?

Yes. Matching tri-clamp fittings, elbows, tees, reducers, end caps, and gaskets in 316L stainless steel are available. Complete hygienic tube systems with matched fittings can be supplied for one-stop hygienic piping procurement.

What surface finishes and Ra roughness levels are available for sanitary tubes?

We supply mill finish, mechanical polishing (180, 240, 320, and 400 grit), and electropolishing per ASTM A270 and ASME B46.1. Surface roughness test reports are provided to ensure compliance with food, dairy, and beverage sanitary standards.

Are TeCarve sanitary tubes certified to 3-A or EHEDG?

TeCarve holds ISO 9001, ISO 14001, and ISO 45001 certifications. While we do not hold direct 3-A certificates, our two partner factories produce sanitary tubes fully complying with ASTM A270 and ISO 2037 standards. Third-party inspections (SGS, BV, TÜV) can be arranged per project.

What is the minimum order quantity for trial sanitary pipe orders?

For standard sanitary tubing sizes, our minimum order quantity starts from 100–300 kg to accommodate new customer trial orders. Standard size samples are available free of charge within 48 hours, with buyer covering international courier freight.

Contact TeCarve

Get in touch with TeCarve for premium stainless steel tubing solutions. Global delivery, factory-direct supply from two partner factories, and reliable service. If any need, please send email to sales@tecarve.com.