How do heat exchanger manufacturers answer tender specifications?
An exchanger enquiry usually includes a material requisition, a thermal and mechanical datasheet for each item, a project exchanger specification, the owner's standards, and the industry standards and pressure code they call up. The fabricator checks each line against the offered design, materials and shop practice. Then they return a compliance statement and a technical deviation list.
Which standards come up in heat exchanger tenders?
| Standard | What it covers | Typical deviation source |
|---|---|---|
| TEMA Standards | Shell-and-tube exchanger construction, with classes R, C and B and a three-letter type designation | Class or type offered differs from the datasheet |
| API 660 | Shell-and-tube heat exchangers for petroleum, petrochemical and natural gas service | Design details, joints, inspection and testing |
| API 661 | Air-cooled heat exchangers for petroleum, petrochemical and natural gas service | Fans, drives, headers, structure, noise |
| API 662 | Plate heat exchangers | Plate and gasket materials, frame design |
| ASME BPVC Section VIII / PED with EN 13445 | Pressure design and conformity | Code, stamp or conformity route offered |
| NACE MR0175 / ISO 15156 | Materials for H2S-containing environments in oil and gas production | Sour-service materials, hardness and certificates |
| EN 10204 | Types of inspection document for metallic products | 3.1 offered where 3.2 is required |
What goes in a heat exchanger deviation list?
Each row names the clause, the requirement, what you offer, the status, a justification and a cost of withdrawal. For exchangers, rows often cover the TEMA type or class, tube-to-tubesheet joint, corrosion allowance, inspection extent, post-weld heat treatment, nozzle loads and who owns the thermal design. Start from the free deviation list template and use the datasheet vs specification checklist for the remaining checks.
How does OdysseyGPT help?
OdysseyGPT reads the whole specification package for your heat exchanger tender: the project and technical specifications, the material requisition, the inspection and test plan, the datasheets and the standards they call up. It checks each customer requirement against your own datasheets, standard specifications and procedures. Each requirement gets a status (complies, deviates, clarification, not addressed, document requested, not applicable or out of scope) with a quote from the source document and page.
It exports an editable compliance matrix and a deviations & clarifications list. It reads PDF, Word, Excel and CSV files. It does not read engineering drawings, and it does not do thermal rating or mechanical design calculations. It does not send anything to the customer. Your engineers decide every open item. See OdysseyGPT for manufacturing.