Products · Fired Equipment & Process Heaters

Indirect Water Bath Heaters

To establish the project design basis for “Indirect Water Bath Heaters”, confirm “Process service and bath conditions” and its inputs: Define heated-fluid flow and properties, pressure/temperature, target temperature, bath-water conditions, heat source and site limits. Final values, supply limits and acceptance criteria are recorded in approved engineering documents; no generic capacity or catalogue guarantee is assumed.

Indirect Water Bath Heaters

From project definition to delivery

Engineering intent and design approach

Engineering of Indirect Water Bath Heaters concentrates on required heat duty, bath temperature, fire-tube heat flux, process-coil pressure drop, burner turndown, freeze protection, expansion and low-level safeguarding. The selected configuration is verified against normal, minimum, start-up, shutdown and credible upset cases, then checked for operability, maintainability, energy use, process safety and site interfaces before the design is frozen.

The design basis for Indirect Water Bath Heaters is defined from service data, design conditions, and battery limits. For this equipment, Process service and bath conditions and Fuel and process conditions must be completed in the datasheet and design documents; performance values and guarantees are set only after the project basis is approved.

Mechanical design and materials

Materials, corrosion allowance, sour-service requirements, piping classes, nozzle design, insulation, coating, supports and maintenance access are coordinated with the actual process conditions and project code hierarchy.

Control, safeguarding and operation

Control philosophy, alarms and trips, cause-and-effect logic, interlocks, start-up and shutdown sequences, safe depressurization and operator access are developed consistently from the P&IDs through functional testing.

Layout, utilities and interfaces

Battery limits, tie-in points, structural loads, cabling, instrumentation, drains, vents, access routes, lifting envelopes and shipping constraints are controlled through coordinated models and interface drawings.

From project definition to delivery

Clear inputs and contract-ready outputs

Proposal quality depends on complete input data and an explicit acceptance basis. The following lists provide a practical starting point and are completed during technical clarification.

Recommended RFQ information

  • “Fuel and process conditions”: Specify fuel composition/pressure/heating value, target temperature, pressure drop, site conditions and emission limits.
  • “Furnace, burner and heat-transfer surfaces”: Define radiant/convection arrangement, coils/tubes, burner, refractory, draft and cleaning strategy for the service.
  • Site and ambient data, hazardous-area classification and HSE requirements
  • Available utilities with pressure, temperature and capacity
  • Applicable standards, materials, supply limits and owner document formats

Typical engineering and supply deliverables

  • Equipment datasheet and design basis for “Indirect Water Bath Heaters”, with service-relevant calculations where included in the supply scope.
  • PFDs, P&IDs, equipment list and technical datasheets
  • Control philosophy, cause and effect, I/O definition and utility summary
  • Plot plan, 3D model, foundation loads and fabrication drawings
  • Inspection and test plans, FAT records, final data book and commissioning support

Technical Datasheet

Technical Datasheet — Indirect Water Bath Heaters

The heat-release and turndown values are published for one indirect-fired heater family. Bath medium, coil, fuel and burner configuration remain application-specific.

Published equipment-family or project data only; not a universal standard limit or Delham rating/guarantee.
ParameterPublished valueReference basisApplicability / limit
Published performance range0.1–15 MMBtu/hPublished performance range for one indirect-fired heater product family.Different sizes/configurations span the range; do not treat it as one model capacity.
Natural-draft burner turndown3:1Published turndown for natural-draft burner arrangements; forced-draft options may differ.Minimum stable firing and emissions must be established for the selected burner/fuel and operating case.
Intermediate bath mediaWater, eutectic salt or thermal oilPublished design options for the indirect-heater family.Media are alternatives, not interchangeable defaults; corrosion, freeze/boil limits and temperature control differ.

Published technical source

Delham Engineering

Define the scope around real project data

Send the available process data, battery limits and expected document list for a technical proposal. The engineering team will identify missing information through a structured clarification register.

Submit technical enquiry