Spezilla Tube Co., Ltd. (Shanghai)
Spezilla Tube Co., Ltd. Excellence in Stainless Steel Tubing
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TP304N U Bend Tubing,ASME SA213 Cold Drawn Stainless Steel U Bend Tubes
Stainless steel grade 304 is the most commonly used stainless steel. Stainless steel grade 304N has better corrosion resistance than grade 302, and is mostly non-magnetic in nature; however when cold worked it acquires a slightly magnetic quality.
| Standards | ASTM A 213, ASME SA 213, ASTM A 249, ASME SA 249, ASTM A 688, ASME SA 688, ASTM A 789, ASME SA 789, ASTM B 163, ASME SB 163, ASTM B 167, ASME SB 167, ASTM B 668, ASME SB 668 |
| Materials | 304/L/H, 316/L/TI, 317/L, 321/H, 347/H, 310S, S31500, S31803,S32205, S32750, S32760, S32001, S32304, N06600, N06625,N08800, N08810, N08811, N08825, N08904, N04400,TI GR.1/GR.2 |
| Outside Diameter | BWG | |||||||
| 22 | 20 | 18 | 16 | 14 | 12 | 10 | ||
| Wall Thickcess mm | ||||||||
| 0.71 | 0.89 | 1.24 | 1.65 | 2.11 | 2.77 | 3.40 | ||
| mm | Inches | Weight Kg/m | ||||||
| 12.70 | 1/2 | 0.214 | 0.263 | 0.356 | 0.457 | - | - | - |
| 15.88 | 5/8 | 0.271 | 0.334 | 0.455 | 0.588 | - | - | - |
| 19.05 | 3/4 | 0.327 | 0.405 | 0.553 | 0.729 | 0.895 | - | - |
| 25.40 | 1 | 0.440 | 0.546 | 0.750 | 0.981 | 1.234 | 1.574 | - |
| 31.75 | 11/4 | 0.554 | 0.688 | 0.947 | 1.244 | 1.574 | 2.014 | - |
| 38.10 | 11/2 | 0.667 | 0.832 | 1.144 | 1.514 | 1.904 | 2.454 | - |
| 44.50 | 13/4 | - | - | 1.342 | 1.774 | 2.244 | 2.894 | 3.50 |
| 50.80 | 2 | - | - | 1.549 | 2.034 | 2.574 | 3.334 | 4.03 |
| Element | Content (%) |
| Chromium, Cr | 18-20 |
| Nickel, Ni | 8-11 |
| Manganese, Mn | 2 |
| Silicon, Si | 1 |
| Nitrogen, N | 0.1-0.16 |
| Carbon, C | 0.08 |
| Phosphorous, P | 0.045 |
| Sulfur, S | 0.030 |
| Iron, fe | Balance |
Grade 304N stainless steel is widely used in the following applications:
Pressure Tubing
ASTM A249 / ASME SA249 (Welded Austenitic Steel Boiler Superheater and Heat Exchanger Tubes)
ASTM A269 / ASME SA269 (Seamless & Welded Austenitic Stainless Steel General Service Tubes)
ASTM A270 / ASME SA270 (Seamless & Welded Austenitic Stainless Steel Sanitary Tubing)
ASTM A213 / ASME SA213 (Seamless Ferritic and Austentic Alloy-Steel Boiler, Super heater and Heat-
Exchanger tubes)
ASTM A179 / ASME SA179 (Seamless Carbon & Carbon Alloy Heat-Exchanger tubes)
Feedwater Heater Tubing
ASTM A688 / ASME SA688 (Welded Stainless Steel Feedwater Heater Tubes, U-Bending Available)
Size Range:
OD 12.7-38MM
Bending radii from 1.5 X OD up to 1250MM. Minimum bending radii for OD′s over 28MM after agreement.
Leg length min. 1,000MM
Leg length max. 12,000MM
Heat treatment for radii up to 1,000MM
Technical standards:
Other specifications or special requirements available upon request. Copies of common standard specifications are available on request.
Hydrotesting:
After heat treatment all U-tubes are hydrotested.
Minimum holding time at the required pressure is 5 sec.
All tubes are dried and carefully cleaned after testing.
Measuring, cutting, deburring, cleaning:
U-bends are measured exactly in accordance with relevant standards, or to customer’s specification.
All tubes are cut to the specified leg lengths, ends are deburred and the tubes are internally cleaned with air.
Before packing, both ends are capped with plastic caps.
Packing:
In strong, open or closed, wooden boxes depending on destination - max. 8,000 kg.
Ends of tubes protected by plastic caps.
Vertical separators for each radius.
Chloride free plastic separators between each row, every 2 meters.
Each bundle is covered with plastic.
Customers can provide a packing drawing.
Packing lists, covered with plastic, are placed on each wooden box for easy identification of order details – including exact list of radii and lengths inside.
