P&M Industries manufactures Steel Pressure Vessel Drums and Boiler Shells for use in the manufacturing of steel pressure vessels and steam boilers. Pressure vessels are designed to hold gasses or liquids at pressures substantially different than ambient pressure. Pressure vessel shells or drums are rolled from steel plates. P&M rolls the pressure vessel drums from a variety of steel materials to ASME Code standards. We ensure that all welds meet the strictest quality standards and are designed to meet your specifications.

Materials

Materials are selected to meet the acceptable temperature ranges and design stresses.

These are set using safety factors applied to the steel properties including:

• Yield strength at application temperature
• Ultimate tensile strength at room temperature
• Creep strength at design temperature
• Charpy Impact Values at design temperature

Steel Materials Used:

• SA516 Grade 55, 60, 65, 75 – Carbon steel for moderate or lower temp applications
• TC128 Grade B – Steel plate – normalized used in pressurized railroad tank cars
• A612 – Moderate & lower temp pressure applications
• SA240 – Stainless Steels are used in a variety industries ranging from the food industry to pressure vessels application with high heat and high corrosiveness.

Process

After the material is chosen based on the application specification the flat plate is cut to size and any openings if required. The shell is then rolled into form. P&M can roll steel plate for pressure vessel shells 12” diameter up to 14’-0” diameter, or larger diameters in segments. Thickness capabilities depend on the rolling diameter and width of materials. The shell is then
rolled into the form specified by the customer. Our welding services then weld the seams; longitudinal & circumferential. The welds can be x-rayed if specified and visually inspected.

P&M Industries also maintains a positive system of identification for the materials used in construction so that all material in the completed pressure vessel can be traced to its origin. Our quality standard complies with the allowable assembly tolerances and forming tolerances of cylinders of the ASME construction codes. These tolerances limit the stresses resulting from out-of-roundness and joint misalignment. Preheating and post-weld heat treatment may be required as specified. Preheat is applied locally to the weld area prior to welding, but post-weld heat treatment is preferably applied to the completed vessel in an enclosed furnace by the customer.

Available Documentation

• Welding procedures applied to the project
• Key weld details, including maps, and personnel
• Non-destructive testing results
• ASME certified partial data packets

Industries We Serve

• Refinery, Oil Refineries & Petro-Chemical Plants
• Green Energy
• Government Buildings
• Hospitals, Hotels and Conference Centers
• Chemical/Pharmaceutical
• Automotive
• Food & Beverage
• Textiles
• Corrugated Containers
• Pulp & Paper
• Architectural Building Supplies
• Ethanol & Bio-Diesel
• Military
• Mining Operations