Yaolong Hygienic manufactures heavy-duty 6" 152.4mm stainless steel tube with a standard 2.77mm wall thickness (12 Gauge), available in prime TP304/304L and TP316/316L grades. Fully compliant with ASTM A270, AS 1528.1, and 3-A Sanitary Standards, our 6inch large diameter tubes are engineered to deliver superior structural strength, exact roundness, and exceptional corrosion resistance.
Each tube is produced via continuous roll forming and automated TIG welding with inert gas backing, followed by inline weld bead rolling and pure hydrogen bright annealing above 1040°C to relieve internal stresses. The inner surface is mechanically polished to Ra ≤ 0.8 µm (32 µin) or precision finished to Ra ≤ 0.51 µm (20 µin) and 100% verified by eddy current testing.
Delivering ultra-low flow friction, high vacuum resistance, and fast CIP cleanability, our 6" 152.4mm stainless steel tubing is the ideal solution for brewery fermentation headers, dairy intake manifolds, central CIP distribution mains, as well as high-capacity data center liquid cooling loops (CDU manifolds).
Standard | ASTM A270, 3-A Sanitary Standards, DIN 11850/10357, ISO 2037, AS 1528.1 |
Material | 304 / 304L / 316 / 316L |
Surface Finish | Mechanical Polish (MP), Electropolish (EP) |
Ra Value | Mechanical Polish (MP): Ra ≤ 0.8 μm (32 μin) / Ra ≤ 0.5 μm (20 μin) Electropolish (EP): Ra ≤ 0.4 μm (15 μin) |
OD Size | 6.0 Inch / 152.4 mm OD (DN150) |
Wall Thickness | 2.77 mm (0.109 in / 12 Gauge)/ 2.11 mm (0.083 in / 14 Gauge) |
Applications | AI Data Centers & Liquid Cooling Systems, Brewery Infrastructure, Dairy Processing, Bulk Liquid Food Transfer, Central CIP & Utility Mains |
Manufacturing | Welded Sanitary Tubing |
Yaolong Hygienic provides full-process quality control for 6" 152.4mm stainless steel tubes, guaranteeing 100% heat number traceability and EN 10204 3.1 Mill Test Certificates (MTC). Raw materials undergo strict chemical spectroscopy and ultrasonic flaw detection before forming. Dimensional checks, wall thickness uniformity, and end concentricity strictly follow ASTM A270, AS 1528.1, and 3-A Sanitary Standards, ensuring structural stability for both food processing and high-reliability data center liquid cooling loops.
Every batch of 6inch stainless steel tubing undergoes multi-point dimensional checks, end squareness verification, and inner surface roughness (Ra) profiling. We conduct 100% inline Eddy Current Testing (ECT) and hydrostatic pressure testing to verify full weld seam integrity. Inspection data sheets and hydrostatic test logs are supplied with every order for engineering commissioning and quality audits.
To meet diverse sanitary and high-purity fluid processing requirements, our 6" 152.4mm stainless steel tubing is available in multiple precision surface finishes, including Mechanical Polishing (MP), Bright Annealed (BA), and Electropolishing (EP). Internal roughness is tightly controlled at Ra ≤ 0.8 μm (32 μin) for standard hygienic lines, Ra ≤ 0.5 μm (20 μin) for high-purity applications, and down to Ra ≤ 0.4 μm (15 μin) with EP treatment. The ultra-smooth, crevice-free inner surface minimizes fluid resistance, prevents media scaling and bacterial biofilm adherence, and maximizes cleanability during automated CIP/SIP cycles. The external surface comes standard with a clean 180–240 grit brushed satin finish (Ra ≤ 0.8 μm) or bright annealed appearance.
All ASTM A270 sanitary tubes undergo full solution annealing at temperatures above 1040°C followed by rapid quenching. This process completely restores maximum corrosion resistance, eliminates residual welding stress, and enhances material ductility. For sensitive food and beverage applications, we supply Bright Annealed (BA) tubing, which features a mirror-like, oxide-free internal finish that minimizes surface micro-voids and optimizes total process hygiene.
304 / 304L Stainless Steel Tubing: Offers excellent general corrosion resistance and outstanding cost-efficiency.
316 / 316L Stainless Steel Tubing: Enhanced with 2-3% Molybdenum and lower carbon content, providing superior pitting resistance against chlorides, organic acids, and aggressive chemical cleaning agents.
To prevent contamination and mechanical scratches during international transit, each 6" 152.4mm stainless steel tube is capped with plastic end protectors and individually wrapped in protective polyfilm. Tubes are bundled and reinforced with heavy-duty woven bags or custom seaworthy wooden cases and steel-framed pallets. Every bundle carries a waterproof shipping tag indicating outer diameter, wall thickness, material grade, standard, and heat number, ensuring rapid warehouse identification and full supply chain traceability.
AI Data Centers & Liquid Cooling Infrastructure: Primary and secondary main distribution headers for CDU (Coolant Distribution Units), high-capacity rack manifold headers for cold plate liquid cooling, and ultra-clean treated water circulation loops.
Brewery & Cellar Infrastructure: Main brewhouse wort transfer lines, central fermentation manifold headers, centrifuge bypass loops, and bulk bright beer routing mains.
Dairy Processing & Silo Matrices: Tanker truck raw milk reception manifolds, vertical milk storage silo valve matrices, pasteurizer feed headers, and high-volume whey transfer lines.
Bulk Liquid Food Transfer: High-capacity liquid sugar and glucose lines, concentrated fruit juice blending mains, edible oil supply loops, and high-flow sauce transfer trunks.
Central CIP & Utility Mains: High-flow Clean-in-Place (CIP) supply and return headers, sterile water distribution loops, and centralized hygienic process utility mains.
| Chemical Composition – TP304/304L & TP316/316L (Standard wt%) | |||||||||
| Grade | C (max) | Si (max) | Mn (max) | Cr | Ni | Mo | S (max) | P (max) | Fe |
| TP304 / 304L | 0.030 | 0.75 | 2.00 | 18.0–20.0 | 8.0–13.0 | N/A | 0.03 | 0.04 | Balance |
| TP316 / 316L | 0.030 | 0.75 | 2.00 | 16.0–18.0 | 10.0–15.0 | 2.0–3.0 | 0.03 | 0.04 | Balance |
| Size OD | Nominal Wall Thickness | Outside Diameter Tolerance | Length Tolerance | Wall Thickness Tolerance | Finish ID (Ra) | Finish OD(Ra) | ||||
| (in) | (mm) | (in) | (mm) | (in) | (mm) | (in) | (mm) | (%) | ||
| ½" | 12.7 mm | 0.065" | 1.65 mm | +/-0.005 | +/-0.13 | +⅛, -0 | +3.18, -0 | +/-10.0% | 32 µ-inch (0.81 µm) | 32 µ-inch (0.81 µm) |
| ¾" | 19.1 mm | 0.065" | 1.65 mm | +/-0.005 | +/-0.13 | +⅛, -0 | +3.18, -0 | +/-10.0% | 32 µ-inch (0.81 µm) | 32 µ-inch (0.81 µm) |
| 1" | 25.4 mm | 0.065" | 1.65 mm | +/-0.005 | +/-0.13 | +⅛, -0 | +3.18, -0 | +/-10.0% | 20 µ-inch (0.51 µm) | 32 µ-inch (0.81 µm) |
| 1½" | 38.1 mm | 0.065" | 1.65 mm | +/-0.008 | +/-0.20 | +⅛, -0 | +3.18, -0 | +/-10.0% | 20 µ-inch (0.51 µm) | 32 µ-inch (0.81 µm) |
| 2" | 50.8 mm | 0.065" | 1.65 mm | +/-0.008 | +/-0.20 | +⅛, -0 | +3.18, -0 | +/-10.0% | 20 µ-inch (0.51 µm) | 32 µ-inch (0.81 µm) |
| 2½" | 63.5 mm | 0.065" | 1.65 mm | +/-0.010 | +/-0.25 | +⅛, -0 | +3.18, -0 | +/-10.0% | 20 µ-inch (0.51 µm) | 32 µ-inch (0.81 µm) |
| 3" | 76.2 mm | 0.065" | 1.65 mm | +/-0.010 | +/-0.25 | +⅛, -0 | +3.18, -0 | +/-10.0% | 20 µ-inch (0.51 µm) | 32 µ-inch (0.81 µm) |
| 4" | 101.6 mm | 0.083" | 2.11 mm | +/-0.015 | +/-0.38 | +⅛, -0 | +3.18, -0 | +/-10.0% | 20 µ-inch (0.51 µm) | 32 µ-inch (0.81 µm) |
| 5" | 127 mm | 0.109" | 2.77 mm | +/-0.030 | +/-0.76 | -1, -0 | +25.4, -0 | +/-10.0% | 20 µ-inch (0.51 µm) | 32 µ-inch (0.81 µm) |
| 6" | 152.4 mm | 0.109" | 2.77 mm | +/-0.030 | +/-0.76 | +1, -0 | +25.4, -0 | +/-10.0% | 20 µ-inch (0.51 µm) | 32 µ-inch (0.81 µm) |
| 8" | 203.2 mm | 0.109" | 2.77 mm | +/-0.040 | +/-1.02 | -0.02/+0 | -0.5, +0 | +/-11.0% | 32 µ-inch (0.81 µm) | 32 µ-inch (0.81 µm) |
| 10" | 254 mm | 0.109" | 2.77 mm | +/-0.050 | +/-1.27 | -0.02/+0 | -0.5, +0 | +/-11.0% | 32 µ-inch (0.81 µm) | 32 µ-inch (0.81 µm) |
| 12" | 304.8 mm | 0.109" | 2.77 mm | +/-0.060 | +/-1.52 | -0.02/+0 | -0.5, +0 | +/-11.0% | 32 µ-inch (0.81 µm) | 32 µ-inch (0.81 µm) |
Outer Diameter & Tolerances: Nominal 6.000" (152.40 mm) with OD tolerance controlled within ±0.030" (±0.76 mm) in compliance with ASTM A270 and 3-A standards.
Standard Wall Thickness: Standard gauge is 2.77 mm (0.109 in / 12 Gauge) for high hoop strength and vacuum resistance. Optional gauges include 2.11 mm and 1.65 mm.
Orbital Welding Alignment: Strict ovality control ($\le$ 1.00 mm) prevents high-low edge mismatch at butt joints during automated orbital welding, ensuring uniform root penetration without crevices.
Tri-Clamp Fit: True circularity guarantees complete 360° contact and reliable gasket compression when assembling standard 6-inch Tri-Clamp ferrules.
304 / 304L: Cost-effective benchmark for neutral liquid distribution, including chilled water loops, brewery wort headers, and raw milk reception mains.
316 / 316L: Contains 2%–3% Molybdenum for maximum pitting resistance against hot acid CIP chemicals, high-salt foods, and closed-loop data center liquid cooling manifolds.
Mechanical Polishing (MP): Standard sanitary finish at Ra ≤ 0.8 μm (32 μin) or high-purity finish at Ra ≤ 0.5 μm (20 μin).
Electropolishing (EP): Available upon request down to Ra ≤ 0.4 μm (15 μin) for ultra-clean and high-purity fluid transfer.
Primary & Secondary Manifolds: Yes, the 152.4mm diameter is widely used for CDU (Coolant Distribution Unit) supply and return distribution headers.
Flow Integrity & Cleanliness: Bright annealed (BA) and polished interiors minimize hydraulic friction, eliminate particle shedding, and protect liquid cooling pump units.
