Views: 4 Author: Site Editor Publish Time: 2024-12-03 Origin: Site
ASTM A182 Threaded Fittings resist corrosion from caustic chemicals, corrosive fluids, oils, and gases, and withstand pressure and high temperatures in plumbing applications and food and dairy processing. Threaded pipe fittings are threaded on both connection ends. Female threads are on the inside of a fitting. Male threads are on the outside of a fitting and screw into the female threads.
ASTM A182 Threaded Fittings Material
A182 is a standard for forged or rolled alloy and stainless steel pipe flanges, forged pipe fittings, valves and parts developed by the American Society for Testing and Materials (ASTM). The standard covers pipe fittings made of a variety of alloy materials, including stainless steel, nickel alloy, etc., which can have threaded connections.
ASTM A182 includes alloy steel, stainless steel, duplex stainless steel.
ASTM A182 Alloy Steel Chemical Composition
CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo |
ASTM A182 F5 | MIN | 0.30 | 4.00 | 0.44 | |||||
MAX | 0.15 | 0.60 | 0.030 | 0.030 | 0.50 | 0.50 | 6.00 | 0.65 | |
ASTM A182 F9 | MIN | 0.30 | 0.50 | 8.00 | 0.90 | ||||
MAX | 0.15 | 0.60 | 0.030 | 0.030 | 1.00 | 10.00 | 1.10 | ||
ASTM A182 F11 CL1 | MIN | 0.05 | 0.30 | 0.50 | 1.00 | 0.44 | |||
MAX | 0.15 | 0.60 | 0.03 | 0.03 | 1.00 | 1.50 | 0.65 | ||
ASTM A182 F12 CL1 | MIN | 0.05 | 0.30 | 0.80 | 0.44 | ||||
MAX | 0.15 | 0.60 | 0.45 | 0.45 | 0.50 | 1.25 | 0.65 |
ASTM A182 Alloy Steel Mechanical Property
MATERIAL | ASTM A182 F5 | ASTM A182 F9 | ASTM A182 F11 CL1 | ASTM A182 F12 CL1 |
T.S (MPA) | 485 min | 585 min | 415 min | 415 min |
Y.S (MPA) | 275 min | 380 min | 205 min | 220 min |
EL % | 20 min | 20 min | 20 min | 20 min |
R/A % | 35 min | 40 min | 45 min | 45 min |
HARDNESS | 143-217 | 179-217 | 121-174 | 121-174 |
ASTM A182 Stainless Steel Chemical Composition
CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo | N |
ASTM A182 F304 | MIN | 8.0 | 18.0 | |||||||
MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 11.0 | 20.0 | 0.10 | ||
ASTM A182 F316 | MIN | 10.0 | 16.0 | 2.00 | ||||||
MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 14.0 | 18.0 | 3.00 | 0.01 |
ASTM A182 Stainless Steel Mechanical Property
MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | R/A % |
ASTM A182 F304 | 515 min | 205 min | 30 min | 50 min |
ASTM A182 F316 | 515 min | 205 min | 30 min | 50 min |
ASTM A182 Duplex Stainless Steel Chemical Composition
CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo | N |
ASTM A182 F51 | MIN | 4.50 | 21.00 | 2.50 | 0.08 | |||||
MAX | 0.03 | 2.00 | 0.030 | 0.020 | 1.00 | 6.50 | 23.00 | 3.50 | 0.20 | |
ASTM A182 F53 | MIN | 6.00 | 24.00 | 3.00 | 0.24 | |||||
MAX | 0.03 | 1.20 | 0.035 | 0.020 | 0.80 | 8.00 | 26.00 | 5.00 | 0.32 |
ASTM A182 Duplex Stainless Steel Mechanical Property
MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | R/A % |
ASTM A182 F51 | 620 min | 450 min | 25 min | 45 min |
ASTM A182 F53 | 800 min | 550 min | 25 min | 15 min |
ASTM A182 Threaded Fittings Types
ASTM A182 threaded fittings include elbows, tees, crosses, couplings, caps, unions, plugs, bushings, hexagonal nipples, etc.
| Threaded Elbow A threaded elbow is a pipe fitting used to change the direction of a pipe, with threads on one or both ends. It usually consists of an elbow body and a threaded part. The bending part of the elbow body is generally 90° or 45°. |
| Threaded Tee Threaded Tee is usually used in some low-pressure small-diameter pipeline systems. It can divide the pipeline into three branches and form a 90-degree angle between the three branches. |
| Threaded Cross Threaded Cross is a pipe connector with four openings, usually used to divide the pipe system into four different directions to achieve the diversion of the medium. |
| Threaded Coupling The threaded coupling is a simple but important pipe connection fitting. Its main structure is a hollow cylinder with threads inside. The threads at both ends of the couplings are usually of the same specification so that it can be connected to threaded pipes of the same diameter. |
| Threaded cap A threaded cap is a pipe fitting used to close the end of a pipe. It is mainly composed of a cap body and a threaded part. The cap body is a hemispherical or flat-top structure with a hollow interior to fit the outer diameter of the pipe. The threaded part is located at the open end of the cap body and is usually machined with internal or external threads, depending on the thread type of the pipe or pipe fitting it matches. |
Advantages and Disadvantages of ASTM A182 Threaded Fittings
Advantages
Installation productivity is moderately high, and specialized installation skill requirements are not extensive.
Leakage integrity is good for low-pressure, low-temperature installations where vibration is not encountered.
Disadvantages
Rapid temperature changes may lead to leaks due to differential thermal expansion between the pipe and fittings.
Vibration can result in fatigue failures of screwed pipe joints due to the high stress intensification effects caused by the sharp notches at the base of the threads.
