Shell & Tube Heat Exchangers
ASME Pressure Vessels
Custom Fabrication


Custom Fabrication

Mason Manufacturing has a long history in custom fabrication working with demanding customers in need of shell and tube heat exchangers, ASME pressure vessels, rotary dryers and tanks. Mason’s experienced team of skilled fitters, certified welders, engineers and professional support personnel are focused experts in custom fabrication resulting in quick response to inquiries, up front delivery date targets, on time delivery, one on one communication, very competitive pricing and full conformance for each uniquely specified vessel.

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Custom Fabrication Process

One-on-One Customer Communication throughout Custom Fabrication Process

Mason is noted for outstanding communications with customers throughout the entire custom fabrication process (e.g. rapid response to inquiries; ongoing one on one communication during process; commitment to timely notification and discussion if problems arise). This also includes immediate communication with the customer if not quoting.

Front-End Understanding of Defined Customer Requirements

The custom fabrication process demands a solid understanding of customer requirements. Mason’s engineers work directly at project inception with customers to ensure this mutual understanding of requirements and objectives. This dialogue often results in enhanced clarity and a custom fabrication solution which better optimizes the customer’s requirements.

Mechanical Engineering and Heat Exchanger Thermal Options

Mechanical engineering ensures compliance with applicable codes. For custom fabrication of shell and tube heat exchangers, Mason provides thermal options for optimizing stated customer thermal requirements.


Mason’s custom fabrication process leverages its buying power to obtain favorable material quotes, estimates fabrication labor and prepares and transmits the quote that includes product description, unit price, delivery terms and timeline for custom fabrication of the vessel.

Custom Fabrication of Ordered Unit

Upon receipt of order, Inside Sales initiates a tracking process for the custom fabrication of the vessel that includes ongoing communication and permanent filing of pertinent job records. Working directly with the customer, engineering develops the basis for creating the fabrication drawing to be customer approved prior to initiating work. With customer concurrence, long lead material items are ordered to facilitate timely delivery of finished unit.

Customer Approval of Custom Fabrication Drawings

Upon customer approval of fabrication drawings, plant operations begin building the unit. In order to conform and comply with customer and code requirements, Mason’s custom fabrication process ensures that units are fabricated under an audited, formal quality control program administered by the Company’s Quality Control Manager.

Quality Defined

Quality at Mason is defined as strict conformance to stated customer requirements, customer specifications, ASME pressure vessel or other applicable codes and accepted industry standards. This includes use of qualified and certified operators, review by Mason’s QC Manager as well as by an independent third party QC inspector (Authorized Inspector). In addition, Mason encourages and welcomes onsite visits by customers and their respective QC personnel throughout the entire custom fabrication process. Units are fully inspected and tested prior to release for shipping.

Logistical Support

Custom fabrication of units often requires special handling due to size and weight whether shipped via truck, rail or barge. To minimize freight costs and better ensure efficient site set-up and safe delivery, Mason provides logistical and engineering assistance. Proactive planning and placement of shipping profile, including optimum dimensional positioning, placement of lift and tail lugs, etc., can significantly reduce shipping costs. In addition, Mason can closely schedule deliveries to minimize customer on site equipment unloading costs. The Mason logistical team is always available to work closely with the customer and their shipping agents.

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