ASTM A192 Boiler Pipe vs ASTM A178 Boiler Pipe When it comes to selecting the right boiler pipe for your project, there are several factors to consider. Two of the most commonly used boiler pipes are A178 boiler pipe and A192 boiler pipe. While both of these pipes can be used for boiler systems and other applications, they have several key differences that should be noted. In this article, we’ll explore the similarities and differences between A178 boiler pipe and A192 boiler pipe, and provide an overview of their applications and key features.
Differences
The major differences between A178 boiler pipe and A192 boiler pipe come down to the chemical composition, mechanical properties, and yield strength.
A192 and A178 boiler pipes are both commonly used boiler pipes used in the construction of boilers. Both are used in high pressure applications, but there are a few differences between the two.
A192 Boiler Pipe
A192 boiler pipe is made from a low carbon steel and is typically used for high pressure applications in boilers. This type of pipe is often used in power plant construction, as well as in the production of superheated steam for steam turbines. It is also used in other applications where high pressure is required, such as in the production of air conditioning and refrigeration systems.
The most common grade of A192 boiler pipe is A192 Grade B7. This grade of pipe is produced according to the ASTM A192 specification and is made from a low carbon steel. It is heat-treated and tempered to the required hardness. The pipe is designed to have a minimum yield strength of 35,000 psi and a minimum tensile strength of 60,000 psi.
A192 boiler pipe is available in a variety of sizes and wall thicknesses, ranging from ½ inch to 12 inches in diameter. This type of pipe is generally used in high pressure applications and is not suitable for use in low pressure applications.
A178 boiler pipe
The comparison between A178 boiler pipe and A192 boiler pipe is an important factor to consider when selecting the type of material for boiler applications. Boiler pipes are used in the construction of boilers, which are used to generate steam for power production, and in the processing of various liquids and gases. Boiler pipes are made from a variety of materials, each having its own specific properties and characteristics that make it suitable for a particular application. A178 and A192 are two of the most commonly used materials for boiler pipes.
A178 boiler pipe is a carbon steel alloy made with 0.06-0.18% carbon, 0.27-0.63% manganese, 0.035% phosphorous, 0.04% sulfur, 0.15-0.35% silicon, and up to 0.40% molybdenum. A178 boiler pipe is typically used in low or medium pressure boiler systems, as well as in fire-tube and water-tube boiler systems. Its strength and malleability makes A178 boiler pipe ideal for welding and bending into desired shapes. A178 boiler pipe is available in both hot.
A192 Boiler Pipe Chemical composition
| Material | Chemical Composition(%) | ||||
| C | Si | Mn | P | S | |
| ASTM A192 | 0.06~0.18 | ≤0.25 | 0.27~0.63 | ≤0.035 | ≤0.035 |
A192 Boiler Pipe Mechanical Properties
9.1 The hardness of the pipe shall not exceed the following values.
| Brinell hardness (wall thickness greater than or equal to 0.200 in. (5.1mm) |
Rockwell hardness (wall thickness is less than 0.200 in. (5.1mm) |
| 137 HB | 77 HRB |
| Material | Mechanical property | |||
| Tensile Strength(MPa) | Yield Strength(MPa) | Elongation δ(%) | Hardness (HRB) | |
| ASTM A192 | ≥325 | ≥180 | ≥35% | ≤77 |
A178 boiler pipe Sizes & Thicknesses
The tubing sizes and thicknesses usually furnished to ASTM A178 are 1/2″ to 5″ [12.7 mm to 127 mm] in outside diameter and 0.035″ to 0.320″ [0.9 mm to 9.1 mm], inclusive, in minimum wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of ASTM A178/ ASME SA-178.
| Element | ASTM A178/ ASME SA-178 | ||
| Grade A | Grade C | Grade D | |
| C | 0.06~0.18 | ≤0.35 | ≤0.27 |
| Mn | 0.27~0.63 | ≤0.80 | 1.00~1.50 |
| P | ≤0.035 | ≤0.035 | ≤0.030 |
| S | ≤0.035 | ≤0.035 | ≤0.015 |
| Si | – | – | ≥0.10 |
*All composition values are in %.
| ASTM A178 | Grade C | Grade D |
|---|---|---|
| T.S. ksi [MPa] |
60 [415] |
70 [485] |
| Y.S. ksi [MPa] |
37 [255] |
40 [275] |
| EL. in 2″ min. % |
30 | 30 |
ASTM A178 boiler pipe and ASTM A192 boiler pipe are both made from carbon steel and are generally used for high-pressure boiler systems and other piping applications. Both pipe types are seamless and are produced using a hot finishing process. They are also both pressure rated and non-ferrous. shengtian pipefitting group Email : [email protected]
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