Overview
Heavy wall pipe is described as pipe with dimensions equal to or greater than the American Society of Mechanical Engineers (ASME) Schedule 80 pipe. Pipe schedules begin with Schedule 10 pipe. As the schedule number increases so does the thickness of the wall of the pipe. It's possible to have two 1/8 inch pipes of different wall thicknesses with different pipe schedule numbers due to the thickness of the pipe wall. The diameter of the pipe or weight per foot does not influence the schedule number. For example, a heavy wall Schedule 80 pipe that's 1/8 inch in diameter has a 0.135 inch wall thickness and an 1/8 inch light wall. Schedule 40 pipe has a wall thickness of just 0.068 inches.
Heavy wall pipe is specified for applications where greater volume is carried, where greater internal pressures exist within the pipe or where the pipe walls must be stronger to support the external burden such as the cover under which they are layed. Heavy wall pipe is also known as Extra Strong or Extra Heavy pipe. There's also a Double Extra Strong designation for pipe that's heavier than Schedule 120 pipe.
Specification
ASTM A213 / A213M - 11a:Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
ASTM A269 - 10:Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
ASTM A312 / A312M - 12:Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
ASTM A511 / A511M - 12:Standard Specification for Seamless Stainless Steel Mechanical Tubing
ASTM A789 / A789M - 10a:Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
ASTM A790 / A790M - 11:Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
DIN 17456-2010:GENERAL PUROSE SEAMLESS CIRCULAR STAINLESS STEEL TUBES.
DIN 17458-2010:Seamless Circular of Austenitic Stainless Steel Tube
EN10216-5 CT 1/2 : Stainless Steel Seamless Pipe & Tube
GOST 9941-81:SEAMLESS COLD- AND WARM-WORKED TUBES MADE OF CORROSION RESISTANT STEEL.
Others like BS, JIS standard or can supply
Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
316L | min. max. | - 0.03 | - 2.0 | - 0.75 | - 0.045 | - 0.03 | 16.0 18.0 | 2.00 3.00 | 10.0 14.0 | - 0.10 |
Mechanical Properties
Grade | Tensile Strength | Yield Strength 0.2% Proof | Elongation | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 316L | 485 | 170 | 40 | 95 | 217 |
Physical Properties
Grade | Density | Elastic Modulus | Mean Co-eff of Thermal Expansion (µm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat | Elec Resistivity | |||
| 0-100°C | 0-315°C | 0-538°C | At 100°C | At 500°C | |||||
| 316/L/H | 8000 | 193 | 15.9 | 16.2 | 17.5 | 16.3 | 21.5 | 500 | 740 |
Applications
- 1. Food processing equipment, particularly in beer brewing, milk processing & wine making.
- 2. Kitchen benches, sinks, troughs, equipment and appliances
- 3. Architectural panelling, railings & trim
- 4. Chemical containers, including for transport
- 5. Heat Exchangers
- 6. Woven or welded screens for mining, quarrying & water filtration
- 7. Threaded fasteners
- 8. Springs
- 9. Ship building, onshore , offshore, Maire.
