Kadıköy, Istanbul · Dilovası plant & warehouse · London office +90 216 545 60 00 +44 7920 259866
Omega Steel Co.Steel supplier · Turkey

Food Grade Stainless Tube

Milk, juice, beer, sauces, syrups — everything that flows in a food plant flows through this tube, and everything that can be cleaned in place has to be smooth inside. It is the tube our food and beverage customers in Turkey, the Gulf and Africa buy with the clamps and elbows in the same order.

DIN 11850 · ISO 2037 · A270Ra ≤ 0.8 µm inside304L · 316LDN 10–100Fittings & clamps in stock
Food grade stainless steel tube — Omega Steel Co., Dilovası plant
From stock, Dilovası warehouse Updated for the September 2026 list Lead time Stock DN 10–100 in 304L: 3–5 working days; 316L, electropolished and A270 inch sizes 2–3 weeks MOQ 300 kg tube; fittings from 10 pcs

What is Food grade stainless steel tube?

Food-grade — sanitary, hygienic, dairy — tube differs from ordinary 2B stainless tube in what happens inside it. It is welded from 304L or 316L strip with a controlled TIG or laser seam, the internal bead is rolled or ground flush, and the bore is polished (mechanically to Ra ≤ 0.8 µm, the DIN 11850 / ISO 2037 / A270 standard, or to Ra ≤ 0.5 µm and electropolished for pharmaceutical and biotech lines under ASME BPE), then bright-annealed in a hydrogen atmosphere or pickled and passivated so that no oxide or crevice remains. The outside is satin or bright, the ends are cut square and deburred, capped and sleeved so nothing enters before installation. Dimensions follow the DN series of DIN 11850 (Ø 13–104 mm × 1–2 mm: DN 25 = Ø 29 × 1.5, DN 50 = Ø 53 × 1.5, DN 100 = Ø 104 × 2), ISO 2037 / 1127 (Ø 12–101.6 × 1.6) or the inch OD of ASTM A270 (½"–4"), and the fittings — bends, tees, reducers, clamp ferrules (Tri-Clamp / ISO / DIN), DIN 11851 unions, SMS unions — are made to the same standard so that the bore is continuous. Grade 304L covers dairy, beverage, juice, beer, edible oil and most food; 316L is required for salty, acidic or hot-CIP products (tomato, pickles, soy sauce, wine, pharma, cosmetics). All material is certified for food contact (EC 1935/2004 / FDA) and carries EN 10204 3.1 with the surface-roughness measurement. We stock DN 10–100 in 304L with the common fittings and clamps, and supply 316L, electropolished and inch-series tube in 2–3 weeks.

Weight table — round tube by OD and wall (kg/m and per 6 m)

Sanitary sizes: DN 10 = 13 × 1.5, DN 15 = 19 × 1.5, DN 20 = 23 × 1.5, DN 25 = 29 × 1.5, DN 32 = 35 × 1.5, DN 40 = 41 × 1.5, DN 50 = 53 × 1.5, DN 65 = 70 × 2, DN 80 = 85 × 2, DN 100 = 104 × 2 (DIN 11850 series 2).

Stainless round tube & pipe 304 / 316 — OD, wall and weight
OD (mm)Wall (mm)kg/mkg per 6 m
2010.4732.84
201.20.5623.37
201.50.6914.15
2020.8975.38
202.51.096.54
2031.2717.63
21.310.5063.04
21.31.20.6013.61
21.31.50.744.44
21.320.9625.77
21.32.51.1717.03
21.331.3688.21
2210.5233.14
221.20.6223.73
221.50.7664.6
2220.9975.98
222.51.2157.29
2231.428.52
2510.5983.59
251.20.7124.27
251.50.8785.27
2521.1466.88
252.51.4018.41
2531.6449.86
26.910.6453.87
26.91.20.7684.61
26.91.50.9495.69
26.921.2417.45
26.92.51.529.12
26.931.78610.72
2810.6734.04
281.20.8014.81
281.50.995.94
2821.2957.77
282.51.5889.53
2831.86811.21
3010.7224.33
301.20.8615.17
301.51.0656.39
3021.3958.37
302.51.71310.28
3032.01812.11
3210.7724.63
321.20.9215.53
321.51.146.84
3221.4958.97
322.51.83711.02
3232.16713
33.710.8154.89
33.71.20.9725.83
33.71.51.2037.22
33.721.5799.47
33.72.51.94311.66
33.732.29413.76
3510.8475.08
351.21.016.06
351.51.2527.51
3521.6449.86
352.52.02412.14
3532.39214.35
3810.9225.53
381.21.16.6
381.51.3648.18
3821.79410.76
382.52.21113.27
3832.61615.7
4010.9725.83
401.21.166.96
401.51.4398.63
4021.89311.36
402.52.33614.02
4032.76516.59
42.411.0316.19
42.41.21.2327.39
42.41.51.5289.17
42.422.01312.08
42.42.52.48514.91
42.432.94517.67
44.511.0846.5
44.51.21.2947.76
44.51.51.6079.64
44.522.11812.71
44.52.52.61615.7
44.533.10218.61
48.311.1787.07
48.31.21.4088.45
48.31.51.74910.49
48.322.30713.84
48.32.52.85317.12
48.333.38620.32
5011.2217.33
501.21.4598.75
501.51.81210.87
5022.39214.35
502.52.95817.75
5033.51321.08
50.811.2417.45
50.81.21.4838.9
50.81.51.84211.05
50.822.43114.59
50.82.53.00818.05
50.833.57221.43
5411.327.92
541.21.5789.47
541.51.96211.77
5422.59115.55
542.53.20819.25
5433.81222.87
5711.3958.37
571.21.66810.01
571.52.07412.44
5722.7416.44
572.53.39420.36
5734.03624.22
60.311.4778.86
60.31.21.76710.6
60.31.52.19713.18
60.322.90517.43
60.32.53.621.6
60.334.28325.7
63.511.5579.34
63.51.21.86211.17
63.51.52.31713.9
63.523.06418.38
63.52.53.79922.79
63.534.52227.13
7011.71910.31
701.22.05712.34
701.52.5615.36
7023.38820.33
702.54.20425.22
7035.00730.04
76.111.87111.23
76.11.22.23913.43
76.11.52.78816.73
76.123.69222.15
76.12.54.58427.5
76.135.46332.78
8011.96811.81
801.22.35614.14
801.52.93317.6
8023.88623.32
802.54.82728.96
8035.75534.53
8412.06812.41
841.22.47514.85
841.53.08318.5
8424.08624.52
842.55.07630.46
8436.05436.32
88.912.1913.14
88.91.22.62215.73
88.91.53.26619.6
88.924.3325.98
88.92.55.38132.29
88.936.4238.52

Welded EN 10217-7 / ASTM A554 (ornamental) and A312 (pressure); density 7.93 kg/dm³; 6 m lengths.

Grades, standards and tolerances

Food grade stainless steel tube — steel grades and standards
Grade / standardYield (MPa)Note
1.4307 / 304L (DIN 11850)≥ 200dairy, beverage, beer, juice, oils — stock
1.4404 / 316L≥ 200acidic, salty, hot CIP, pharma, cosmetics
1.4435 / 316L high-Ni≥ 200ASME BPE pharma, electropolished
1.4301 / 304≥ 210non-product-contact frames and covers

Surface classes: Ra ≤ 0.8 µm (standard sanitary), ≤ 0.5 µm (high hygiene), ≤ 0.4 µm electropolished (pharma / WFI). All grades food-contact certified.

Sanitary tube standards and sizes

The three sanitary tube systems — sizes are not interchangeable; fittings must match the tube standard
StandardSizingExample DN 50 / 2"WallFittingsRegion
DIN 11850 (series 2)DN, metric ODDN 50 = Ø 53 × 1.51.5 / 2 mmDIN 11851 unions, DIN 32676 clampsEurope, Turkey, Middle East
ISO 2037 / 1127metric ODØ 50.8 × 1.61.2–2 mmISO clamps, SMS unionsScandinavia, Asia
ASTM A270inch OD2" = Ø 50.8 × 1.650.065"Tri-Clamp (ASME BPE)US, Gulf projects with US EPC
DIN 11866 / ASME BPEmetric or inchas aboveorbital-weld ends, EPpharma / biotech

A DN 50 DIN tube (Ø 53) does not fit a 2" Tri-Clamp ferrule (Ø 50.8) — confirm the standard before ordering fittings.

Surface roughness and cleaning

Internal finish classes and the processes they are specified for
Internal finishRa (µm)How madeSpecified for
Standard sanitary≤ 0.8bead-rolled, mechanically polished, pickleddairy, beverage, food, CIP-cleaned lines
High hygiene≤ 0.5polished 240–320, passivatedbaby food, sensitive products, cosmetics
Electropolished (EP)≤ 0.4 (0.25)electrochemical smoothing after polishpharma, biotech, WFI, ASME BPE SF4
Bright annealed (BA)≤ 0.8hydrogen-atmosphere anneal, no picklinginstrument tube, orbital-welded lines

CIP compatibility depends on drainable layout and dead-leg length as much as on Ra; we supply fittings with the same finish class.

Lengths and stock

DN 10–100 (DIN 11850) in 304L Ra ≤ 0.8 with the matching bends, tees, reducers, DIN 11851 unions and clamp ferrules are stock items at Dilovası; 316L tube, Ra 0.5, electropolished and A270 inch sizes are supplied in 2–3 weeks. 6 m lengths, ends capped.

Cutting, orbital welding and installation

Cut square with a cold saw or orbital cutter, deburr inward and outward, keep the bore clean; join by orbital TIG welding with argon purge (no filler for ≤ 2 mm, matching filler otherwise) for a smooth, crevice-free weld, or by DIN / SMS unions and clamp ferrules where dismantling is needed; pickle and passivate welds. Install with a slope for drainage and short dead legs; support at 1.5–3 m; use stainless clips with EPDM inserts. Keep carbon steel away and cap open ends on site.

Where it is used

  • Dairy, milk collection and cheese plants
  • Breweries, wineries, juice and soft-drink lines
  • Food processing: sauces, oils, syrups, tomato paste
  • Cosmetics and personal-care plants
  • Pharmaceutical, biotech and WFI systems (EP, 316L)
  • CIP systems, tanks, manifolds and skids

Sanitary tube vs ordinary 304 tube

Ordinary 304 pipe has an internal weld bead and a rough bore where product lodges and bacteria grow; it is fine for water, air and structures, not for product lines. Sanitary tube costs 20–30 % more and comes with a fitting system. For chloride and acidic products use the 316L version; for pressure services outside the product zone, seamless pipe.

Price

Sanitary tube is priced per metre by size, grade and finish class — 20–30 % above plain 2B tube for Ra 0.8, more for EP — and follows nickel; the bands below are the month\'s indicative FOB Istanbul ranges for 304L and 316L in the DN 25–65 range. Fittings and clamps per piece.

Sanitary 304L · DN 25–654 000 – 4 400USD/MT · FOB Istanbul
Sanitary 316L · DN 25–654 950 – 5 350USD/MT · FOB Istanbul

Bands from our weekly export list (September 2026), FOB Istanbul, full-container quantities, excluding freight and certificates. Firm price per project on RFQ within one working day.

Export and packing

Sanitary tube travels capped and sleeved: every tube gets plastic end caps and a PE sleeve, bundles of ≤ 150 kg go in PE and cardboard, and the lot is crated with the fittings boxed and labelled by standard and DN; 10–12 t per 20', 16–18 t per 40' HC. HS 7306.40 (tube), 7307.29 (fittings).

TermDetail
MOQ300 kg tube; fittings from 10 pcs
IncotermsFOB Istanbul · CIF / CFR Gulf, Africa · DAP EU, Balkans, Iraq, Caucasus · DAP Aktau
Lead timeStock DN 10–100 in 304L: 3–5 working days; 316L, electropolished and A270 inch sizes 2–3 weeks
PackingEnds capped, each tube in PE sleeve, bundles ≤ 150 kg in PE and cardboard, crated
Container / truck20' ≈ 10–12 t; 40' HC ≈ 16–18 t
DocumentsInvoice, packing list, EN 10204 3.1, certificate of origin; 3.2 and PED on request
Payment30% advance, balance against B/L copy; L/C at sight above 100 t

Certificates

Each lot ships with EN 10204 3.1 (heat, chemistry, mechanicals), the surface-roughness report (Ra inside, per tube standard), the food-contact declaration (EC 1935/2004 / FDA) and, for pharma, the electropolishing and ferrite reports; 3.2 witnessing on request.

How to order

Specify the standard (DIN 11850 / ISO 2037 / A270), DN or OD × wall, grade (304L / 316L), internal Ra class (0.8 / 0.5 / EP), length, quantity in metres, the fittings list (bends, tees, unions, clamps, ferrules — same standard), and the product line (we confirm grade and finish).

Standards

  • DIN 11850 / DIN 11866 — hygienic tubes (metric, DN series)
  • ISO 2037 / ISO 1127 — stainless tubes for the food industry
  • ASTM A270 — sanitary tubing (inch OD)
  • EHEDG / 3-A guidelines; EC 1935/2004 food contact; EN 10204 3.1

Grades

Grade data sheets (chemistry, mechanicals, equivalents) are on our reference site: 1.4307 · 1.4404 · 1.4301

Frequently asked questions

What is food-grade stainless tube?

Sanitary tube in 304L or 316L with the internal weld bead removed and the bore polished to Ra ≤ 0.8 µm (DIN 11850, ISO 2037, ASTM A270), bright-annealed or pickled, so product lines can be cleaned in place; supplied with matching hygienic fittings.

304L or 316L for food lines?

304L for dairy, beer, juice, oils and most foods; 316L for salty, acidic or hot-CIP products (tomato, pickles, wine, soy) and for pharma and cosmetics.

Are DIN 11850 and Tri-Clamp sizes the same?

No — DIN DN 50 is Ø 53 mm, a 2" Tri-Clamp (A270) tube is Ø 50.8 mm; fittings must match the tube standard.

What Ra do I need?

Ra ≤ 0.8 µm for standard food and beverage CIP lines; ≤ 0.5 for sensitive products; electropolished ≤ 0.4 µm for pharma / WFI under ASME BPE.

Do you supply the fittings too?

Yes — bends, tees, reducers, DIN 11851 and SMS unions, clamp ferrules and clamps in the same standard and finish, from stock for DIN DN 10–100.

Is the tube certified for food contact?

Yes — EC 1935/2004 / FDA food-contact declaration with the EN 10204 3.1 certificate, including the surface-roughness measurement.