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Austenitic Stainless Steel Sanitary Tubing ASTM A270 / DIN 11850 / BPE / 3A
Manufacturing Standard: ASTM A270, DIN 11850, 3A, SMS, BPE, ISO2037, IDF
Material: 304, 304L, 316, 316L
Type: Seamless, Welded
Outer Diameter: 10.3~219.1mm
Wall Thickness: 0.8~4mm
Welding method: TIG or TIG + Plasma
Marking: Brand, Standard, Grade, Size, Heat number, Surface finish.
Inspection items: Chemical Composition; Size; Flare Test; Flatten Test; Flange test; Reverse Bend Test; Reverse Flatten Test; Hardness Test; Hydrostatic Test or Eddy current test or Air Pressure Test; Surface quality; etc.
Application: Food, pharmaceuticals, dairy, beer, beverage, chemistry industry, etc.
Size for 3A/BPE/ASTM A270/ISO2037:
OD(inch) 1/2" 5/8" 3/4" 1" 1 1/4" 1 1/2" 2" 21/2" 3" 3 1/2" 4" 4 1/2" 5" 6" 8"
OD(mm) 12.7 15.88 19.1 25.4 31.8 38.1 50.8 63.5 76.2 88.9 101.6 114.3 127 152.4 219
WT 0.80                          
WT 1.0                    
WT 1.20              
WT 1.25                
WT 1.50          
WT 1.60            
WT 1.65            
WT 2.00        
WT 2.11        
WT 2.50          
WT 3.00              

Size for DIN11850:
OD(DN) 10 15 20 25 32 40 50 65 80 100 125 150 200
OD(mm)Series 1 12 18 22 28 34 40 52            
OD(mm)Series 2 13 19 23 29 35 41 53 70 85 104 129 154 204
OD(mm)Series 3 14 20 24 30 36 42 54            
WT 0.80                        
WT 1.00                  
WT 1.20            
WT 1.50          
WT 1.65              
WT 2.00              
WT 3.00                  
WT 4.00                  

Size tolerance:
ASTM A270 Size Tolerance OD Tolerance WT Tolerance Length Tolerance
OD Tolerance OD Tolerance
≤25.4mm ±0.13mm ±10% ≤101.6mm +3.2mm-0mm
>25.4mm, ≤50.8mm ±0.20mm >101.6mm +4.8mm-0mm
>50.8mm,≤76.2mm ±0.25mm
>76.2mm,≤101.6mm ±0.38mm
>101.6mm,≤139.7mm ±0.38mm
>139.7mm,≤203.2mm ±0.76mm
>203.2mm,<304.8mm ±1.27mm

Chemical Composition
Chemical Composition % Max
Grade C Si Mn P S Ni Cr Mo
304 0.08 1.00 2.00 0.045 0.03 8.00~11.00 18.00~20.00
304L 0.035 1.00 2.00 0.045 0.03 8.00~11.00 18.00~20.00
316 0.08 1.00 2.00 0.045 0.03 10.00~14.00 16.00~18.00 2.00~3.00
316L 0.035 1.00 2.00 0.045 0.03 10.00~14.00 16.00~18.00 2.00~3.00

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