ASME Section I Code Calculations for Boiler Tubes Quiz

ASME Boiler and Pressure Vessel Code

• Section II lists the materials approved for constructing boilers or pressure vessels.
• Material specification documents outline the requirements for material selection, including mechanical properties, chemical composition, and testing requirements.

Boiler Design Mechanisms

• Primary mechanisms in boiler design include the management of stress, strain, and corrosion.

ASME BPVC Section 1

• Tables in Section II of the ASME Boiler and Pressure Vessel Code determine the maximum allowable stress values for different materials at various temperatures.
• Formulas in ASME BPVC Section 1, PG-27.2.1 can be used to calculate the maximum allowable working pressure, which depends on the vessel's dimensions, material, and desired safety factor.

Material Selection and Fabrication

• Metal selection for boiler design must account for factors such as corrosion resistance, high-temperature strength, and ductility.
• The design formulas in this chapter contain factors and coefficients that account for variables such as temperature, pressure, and material properties.
• An example of efficiency in the context of materials fabrication is the minimization of material waste and optimization of fabrication processes.

Seamless Cylinders and Welds

• The efficiency of seamless cylinders is typically higher than that of welded cylinders due to the lack of weld joints.
• For longitudinal seam welds in vessels operating at high temperatures, the factor of thermal expansion must be considered to prevent cracking and failure.

ASTM/ASME Specifications

• The ASTM/ASME specification number refers to the unique identifier for a specific material grade, which outlines its mechanical and chemical properties.
• The letters H, M, and L are used with carbon steel to indicate increasing tensile or yield strength, or an increase in carbon content.
• The letter P in ASTM grade designators for pipe, tube, and forging products indicates the type of product.
• The letter F in the context of pipe manufacturing indicates that the pipe is fabricated using a furnace process.
• TH in ASTM grade designators for pipe, tube, and forging products indicates that the product is thermally treated.