ASME SA192 Seamless Carbon Steel Boiler Tubes for High Pressure Service

1、 Standards and specifications

International standard benchmarking

ASME SA192 and ASTM A192 belong to the same standard system, specifically designed for high-pressure boilers, superheaters, and other equipment. The corresponding Chinese standard is 20G/GB5310-2008, and the chemical composition and mechanical performance requirements are basically the same.

The material has significant low-carbon characteristics, with a carbon content between grade 10 and 20 steel, suitable for high temperature and high pressure environments.

Applicable scenarios

Mainly used for high-pressure steam pipelines, boiler heating surfaces, and heat exchangers in the power and petrochemical industries, with a long-term temperature resistance limit of 482 ℃ 35.

2、 Core parameters and performance

Chemical composition

Carbon (C): 0.06-0.18%, low-carbon design improves weldability and toughness.

Manganese (Mn): 0.27-0.63%, strengthens grain structure and improves fatigue resistance.

Impurity control: Phosphorus (P) and sulfur (S) are both ≤ 0.035% to reduce the risk of brittle fracture.

Mechanical properties

Tensile strength: ≥ 325MPa, meeting the demand for high-pressure pressure.

Yield strength: ≥ 180MPa, ensuring deformation resistance at high temperatures.

Elongation rate: ≥ 35%, suitable for thermal stress impact.

Size specifications

Outer diameter range: 1/2 inch to 7 inches (12.7-177.8mm), special sizes can be customized up to 25.

Wall thickness range: 0.085-1.000 inches (2.2-25.4mm), balancing pressure and heat transfer efficiency of 25.

3、 Production process and testing

Manufacturing process

Adopting cold drawing forming process to ensure dimensional accuracy (tolerance ± 0.10mm) and surface smoothness (Ra ≤ 0.8 μ m).

Heat treatment process optimizes grain structure and improves high-temperature stability by 5.

Quality inspection

Perform hydrostatic testing and ultrasonic testing on each unit to ensure no leakage or internal defects.

Surface defects (such as cracks and folds) are strictly controlled according to standards.

4、 Selection and Application Points

Selection matching

Select the outer diameter and wall thickness based on the aperture of the tube plate to avoid excessive installation clearance or interference.

The environment containing hydrogen sulfide (H ₂ S) requires special processing to reduce the risk of corrosion.

Typical applications

Power industry: boiler water-cooled wall, superheater pipeline.

Petrochemical equipment: high-temperature oil and gas transmission pipelines, heat exchangers.

Industrial boiler: high-pressure steam conveying system.