| Cellulose steeping and pressing | Steeping vessels or presses, caustic circulation equipment, and related material-handling components. | Confirm compatibility with the specified pulp, alkali concentration, batch or continuous operating method, and plant capacity. | Check foundation loads, access for pulp handling, drainage, chemical storage, and connections to the plant’s process and utility systems. | Request commissioning procedures, operator training, recommended wear-part lists, and guidance for inspecting seals and moving components. |
| Shredding and cellulose aging | Shredders, conveyors, aging bins or chambers, and associated temperature and process-control instruments. | Clarify the expected feed characteristics, throughput basis, equipment duty, control scope, and interfaces with upstream pressing and downstream processing. | Plan for equipment access, safe material transfer, dust management where applicable, electrical supply, and maintenance clearance. | Check availability of knives or other wear parts, maintenance documentation, troubleshooting support, and remote technical assistance. |
| Xanthation and viscose preparation | Reaction vessels, carbon disulfide metering and transfer equipment, dissolvers, and process instrumentation. | Establish which process and equipment responsibilities are included in the package; review materials of construction and hazardous-area requirements with qualified engineers. | Requires coordinated process design, ventilation, gas detection, electrical-area classification, emergency systems, and controls for carbon disulfide and hydrogen sulfide hazards. | Verify that commissioning, safety documentation, control-system support, and maintenance training cover the supplied equipment and its operating hazards. |
| Viscose ripening, filtration, and deaeration | Ripening or holding tanks, filters, pumps, and deaeration equipment, depending on the process design. | Compare equipment scope, filtration arrangement, control and instrumentation boundaries, and compatibility with the required viscose quality and production plan. | Confirm piping layouts, tank access, pump foundations, instrument connections, and tie-ins to the spinning preparation area. | Ask for filter maintenance instructions, troubleshooting procedures, spare-part recommendations, and support for process start-up. |
| Spinning and coagulation | Spinning machines, metering pumps, spinnerets, spinning-bath circulation equipment, and related controls. | Specify the intended fiber product and line configuration; document interfaces among viscose delivery, spinning equipment, bath systems, and downstream take-up. | Requires accurate alignment, stable process and utility connections, suitable bath-system layout, and coordinated installation of controls and instrumentation. | Confirm access to spinnerets and other precision parts, repair guidance, operator training, and technical assistance during trial runs. |
| Fiber cutting and washing | Fiber cutters, washing equipment, conveying systems, and associated process-liquid handling components. | Check the specified fiber form, cut-length requirements, expected feed conditions, and interfaces with spinning and finishing equipment. | Plan for wet-process drainage, liquid collection and routing, equipment access, and safe handling of fiber and process streams. | Review cutter maintenance requirements, blade or wear-part supply, cleaning procedures, and response arrangements for production interruptions. |
| Bleaching and finishing | Process vessels or treatment equipment, chemical dosing systems, pumps, and controls as required by the selected process. | Confirm the agreed process scope, chemical compatibility, product-quality requirements, and any required wastewater-treatment interfaces. | Verify chemical storage and containment, corrosion-compatible materials, drainage, ventilation, and connections to treatment and utility systems. | Request chemical-handling and maintenance instructions, training materials, and support for process-control and instrumentation issues. |
| Drying and baling | Fiber dryers, conveying equipment, balers, and packaging interfaces. | Define the product and packaging specification, feed and discharge interfaces, automation boundaries, and required coordination with the plant layout. | Check building access, lifting and installation plans, exhaust and utility connections, electrical supply, and safe access for cleaning and maintenance. | Verify service procedures for drives and controls, spare-part lead times, maintenance training, and support for line integration. |
| Plant-wide controls and integration | Control panels, instrumentation, software, communications, and interfaces between process packages, where included in the contract. | List control-system boundaries, documentation languages, data and communications standards, cybersecurity responsibilities, and ownership of configuration files. | Coordinate instrument installation, cable routing, panel locations, network interfaces, and functional testing with all package suppliers. | Confirm software backup and recovery procedures, license terms, update policy, remote-support conditions, and training for plant personnel. |
| Engineering, installation, and commissioning | May include engineering documents, supervision, installation guidance, pre-commissioning checks, commissioning, and performance testing. | Use a written scope matrix to distinguish supplied equipment from civil works, piping, electrical work, erection, and buyer-provided services. | Agree on site readiness, lifting plans, local contractor interfaces, inspection responsibilities, and acceptance criteria before shipment. | Document warranty start and coverage, service-response channels, escalation steps, training deliverables, and the process for warranty claims. |