01CNC plate preparation
Accurate cutting provides the foundation for repeatable forming and assembly.
Manufacturing & quality
China Boiler Manufacturer: Production Base in Linyi
JIELI is a China boiler manufacturer of thermal oil heaters and industrial steam boilers. Our workflow connects material preparation, forming, welding, inspection, controls integration and export delivery.
Workshop capability
Critical operations stay visible from start to finish.
Our workshop photographs show pressure-part preparation, forming, welding, inspection, control-system assembly and preparation for delivery.
01
02Plate rolling & forming
Shell and pressure-part geometry is formed with controlled equipment and fit-up.
03Thermal-oil coil forming
Coil geometry and circulation paths are fundamental to heater performance.
04Automatic welding
Mechanized welding supports stable parameters and repeatable joint quality.
05Heat-transfer assembly
Tube banks and heat-transfer surfaces are assembled against the engineering arrangement.
06Non-destructive examination
Inspection and verification are built into the manufacturing sequence.
Supplier due diligence
How to evaluate a boiler manufacturer in China
Before ordering, ask the boiler manufacturer for the production schedule, inspection plan and quality documents included in the quotation. Agree who supplies the boiler, auxiliaries and controls, and who carries out installation.
Confirm product and code scope
Define whether the project needs a thermal oil or thermal fluid heater, a steam boiler, or a complete plant. Confirm the applicable design, inspection and documentation requirements for the destination country.
Trace pressure parts and welding
Review material identification, forming controls, welding procedures, welder qualifications and inspection points. The records should connect the finished equipment to the approved technical documents.
Verify testing and controls
Confirm non-destructive examination, pressure testing, control-panel checks, burner or combustion-system matching, safety interlocks and the final inspection documents included in the supply.
Compare the full delivery boundary
Pumps, water treatment, tanks, heat recovery, fuel handling, dust control, valves, instruments, commissioning support and export packing can materially change the scope. Compare quotations on the same boundary.
Manufacturer FAQ
Questions international buyers ask.
Is JIELI a boiler manufacturer in China?
Yes. Shandong Jieli Thermal Equipment Co., Ltd. manufactures thermal oil heater and steam boiler equipment in Linyi, Shandong, China, with in-house fabrication, assembly, inspection and system-integration capabilities shown on this page.
What should be requested from a China boiler manufacturer before ordering?
Request the technical proposal, supply boundary, key design conditions, material and welding documentation plan, inspection and test plan, performance basis, layout, utility requirements, packing method and after-sales scope.
Can the manufacturer supply a complete boiler system?
The scope can be boiler-only or a coordinated system including combustion equipment, pumps, tanks, water treatment, heat recovery, controls and other auxiliaries. Final scope depends on the project data and local responsibilities.
Inside our workshop
Manufacturing process gallery.
Workshop views covering forming, welding, heat treatment, inspection, controls and production equipment. For a project assessment, request the applicable inspection records and agreed test plan alongside these images.
DOCUMENTED QUALITY
Agree the evidence package before manufacturing starts.
Project documentation: agree the applicable design code, inspection route and required records before order. A reference to ASME or CE/PED requirements is distinct from holding a current certificate or authorization for a particular scope. Verify the issuer, legal entity, scope and validity of any required certificate.
Use this checklist to define the records required for your equipment and destination. The final contract and inspection plan determine which documents apply.
| Stage | Records to agree and verify | What the buyer checks |
|---|---|---|
| Supplier qualification | Current manufacturing license; any specifically required certificate or authorization | Legal entity, issuing body, scope and expiry |
| Design and fabrication | Approved drawings, material traceability, welding procedures and personnel qualifications | Link to the equipment model, serial number and applicable design basis |
| Inspection and testing | Agreed NDE, pressure-test and control/interlock test records | Acceptance criteria, responsible parties, dates and signed results |
| Delivery and handover | Packing list, manuals, as-built documents and commissioning responsibility | Document language, supply boundary and outstanding items |
Regulatory manufacturing license
Licensed boiler and pressure vessel manufacturing.
JIELI THERMAL is licensed by Chinese regulatory authorities for boiler and pressure vessel manufacturing. Project-specific design, fabrication, inspection and documentation can follow applicable ASME, CE (PED Directive) and other standards.
Packing & delivery
Prepared for transport and international delivery.
26 archive photos show boiler bodies, auxiliaries and complete systems being packed, loaded and prepared for shipment.
MANUFACTURER VERIFICATION
What to verify when choosing a thermal oil heater or steam boiler manufacturer.
A credible thermal oil heater manufacturer or steam boiler manufacturer should show pressure-part and coil fabrication, welding controls, inspection records, assembly capability and a clear test plan.
For gas-fired equipment, request the burner and fuel-train specification and the agreed emissions basis. For biomass equipment, request the fuel design envelope, grate and feeding arrangement, ash handling and dust-control scope. Use the thermal oil heater supplier checklist or steam boiler manufacturer checklist to compare documentation and responsibility before order.
Start a project
Tell us what your process needs.
Share your fuel, required capacity, operating conditions and project location. Our team will help shape the boiler and the complete system around your actual production requirements.