Comparison duty basis
Prepare shared duty schedule for the comparison duty basis review. Identify the relevant project operating cases separately in the requirement schedule. Include the circuit or equipment references for each case, and ask the supplier to state which proposed configuration its response addresses before comparing that response with another proposal for the same duty. Ask which operating cases should be identical when requesting gasketed and brazed proposals?
Use the same fluid descriptions when requesting gasketed and brazed proposals for a comparison. Identify the normal operating cases and any cleaning exposure that both responses must address. Ask each response to name its proposed construction and explain which submitted duty it covers before comparing access arrangements, installation drawings or the requested maintenance documentation.
Maintenance comparison
Prepare inspection expectations for the maintenance comparison review. Describe the information being requested and identify the equipment concerned. Request the corresponding technical document for the proposed item, and ask which specific parts of the buyer requirement are addressed so the response can be compared with the intended purchase scope. Ask what maintenance questions should be asked of each proposed construction?
Request or submit cleaning requirements, according to the proposed purchase scope. Describe the exchanger condition and identify the areas or circuits concerned. Include the cleaning substances and maintenance records available to the buyer, and request a written response addressing the intended inspection or cleaning scope before discussing the corresponding work arrangements.
Installation comparison
Prepare available envelope for the installation comparison review. Describe the information being requested and identify the equipment concerned. Request the corresponding technical document for the proposed item, and ask which specific parts of the buyer requirement are addressed so the response can be compared with the intended purchase scope. Ask which installation constraints should be applied to both alternatives?
Request or submit connection layout, according to the proposed purchase scope. Mark the equipment boundaries and connection locations on the project drawing. Request the corresponding interface drawing for the proposed exchanger, and compare its orientation and connection identification with the buyer piping plan before requesting clarification of any changed interface.
Replacement planning comparison
Prepare existing equipment records for the replacement planning comparison review. Describe the information being requested and identify the equipment concerned. Request the corresponding technical document for the proposed item, and ask which specific parts of the buyer requirement are addressed so the response can be compared with the intended purchase scope. Ask which replacement expectations should be discussed for each option?
Request or submit replacement scope, according to the proposed purchase scope. Describe the information being requested and identify the equipment concerned. Request the corresponding technical document for the proposed item, and ask which specific parts of the buyer requirement are addressed so the response can be compared with the intended purchase scope.
Document comparison method
Prepare construction descriptions for the document comparison method review. Request a description and drawing that identify the particular assembly being proposed. Ask which parts of the configuration the document covers, and compare its interface and access information with the project requirement before asking for clarification of an alternative construction. Ask which documents allow the buyer to compare the actual proposed assemblies?
Request or submit component drawings, according to the proposed purchase scope. Describe the information being requested and identify the equipment concerned. Request the corresponding technical document for the proposed item, and ask which specific parts of the buyer requirement are addressed so the response can be compared with the intended purchase scope.
Purchase decision questions
Prepare technical query log for the purchase decision questions review. Name the requirement that needs a written answer and identify the proposed item concerned. Request clarification against the buyer document rather than a general category description, and compare the response with the same requirement when considering an alternative equipment configuration. Ask which unanswered questions should be resolved before choosing between the alternatives?
Request or submit quotation scope, according to the proposed purchase scope. Name the requested item and distinguish the main equipment from separately requested components. Ask the supplier to identify the corresponding items in the proposal, and confirm minimum order quantity and lead time before ordering against the agreed configuration and receiving requirements.
Gasketed vs brazed plate heat exchanger: documents to request
| Ask about | Request with your inquiry |
|---|---|
| Which operating cases should be identical when requesting gasketed and brazed proposals? | Shared duty schedule and fluid descriptions |
| What maintenance questions should be asked of each proposed construction? | Inspection expectations and cleaning requirements |
| Which installation constraints should be applied to both alternatives? | Available envelope and connection layout |
| Which replacement expectations should be discussed for each option? | Existing equipment records and replacement scope |