Factory Tour
Inside the factory that will build your order
Steel tube arrives at one end of the building and leaves the other as packed, tested beds ready for container loading. Everything in between happens under one roof.
Factory at a glance
Manufacturing site in Hebei Province, China; head office in Tianjin. Certified to CE, EN 747, EN 1725, ISO 9001:2015, verified by SGS.
Most buyers never see the factory that makes their beds. That is a risk: welding and coating quality are the two things that decide whether a dormitory order lasts five years or starts rusting in one, and both are invisible in a showroom sample. This page shows the actual sequence your order goes through, the workshop behind each stage, and the paperwork that comes with it.
The manufacturing process, step by step
Eleven stages from raw tube to loaded container. Each one has a control point, because a defect found at stage four costs a frame; the same defect found at your warehouse costs a container.
STEP 1
Laser Tube Cutting
Steel tube is cut to length on CNC laser cutters. Cutting to a fixed tolerance is what makes every frame in a 500-unit order come out the same size — no hand-trimmed tubes, no gaps at the joints.
Buyer benefit: identical frames across the whole batch, so installation crews do not fight misaligned parts on site.
STEP 2
Drilling and Punching
Holes are drilled and punched on jigs, all located from the same datum. Bolt holes, ladder mounts and guardrail fixings therefore line up exactly when the frame is assembled.
Buyer benefit: beds bolt up square and stay tight. No rattling, no re-drilling on site.
STEP 3
Frame Welding
Bed ends, ladder frames, guardrails and support rails are welded with CO2-shielded arc welding. Welders work to the production drawing, and joints are checked for penetration before the frame moves on.
Buyer benefit: joint strength is consistent on every unit, not just on the sample you approved.
STEP 4
Grinding and Deburring
Every weld is ground back and burrs removed. This is the step that most suppliers skip, and it is the reason coating fails early on cheap frames — powder will not bridge a sharp edge.
Buyer benefit: a smooth, even surface under the coating, with no rust starting at a rough weld.
STEP 5
Surface Pretreatment
Frames go through degreasing, rinsing, derusting and phosphating before any coating is applied. Phosphating gives the steel a conversion layer that the powder bonds to.
Buyer benefit: the coating adheres properly and resists corrosion — the difference between a finish that lasts and one that flakes within a year.
STEP 6
Electrostatic Powder Coating
Frames are coated electrostatically with polyester powder on a conveyorised line. Because the powder is charged, it wraps around tube corners and recesses instead of running off like liquid paint.
Buyer benefit: uniform coverage including edges and corners, in the RAL colour you specify.
STEP 7
Curing
Coated frames pass through a curing oven where the powder melts and cross-links into a continuous film. The result is a hard, scratch-resistant finish suited to dormitory and institutional use.
Buyer benefit: a surface that survives daily institutional wear, not a showroom-only finish.
STEP 8
Trial Assembly
A first-off frame from each batch is fully assembled before the run continues. If a hole or bracket does not match, the jig is corrected before another hundred units are made the same way.
Buyer benefit: the bulk order matches the approved sample — the commonest complaint in furniture sourcing.
STEP 9
Inspection and Load Testing
Finished frames are checked for dimensions, weld quality, coating thickness and finish. Bed frames are load tested to 200 kg per berth, and SGS test documentation is available for tender submissions.
Buyer benefit: documented evidence for your tender file, not a verbal claim.
STEP 10
Packing
Parts are wrapped in protective foam, separated to avoid coating-to-coating rubbing, and packed into export cartons. Knock-down packing is standard and keeps container volume to a minimum.
Buyer benefit: fewer scuffed units on arrival and a lower landed cost per bed.
STEP 11
Container Loading
Cartons are loaded and braced for long-haul sea freight. We provide loading photos and a packing list before the container leaves, so you know exactly what is inside and how it is stacked.
Buyer benefit: no surprises at destination, and documentation ready for customs.
Workshops and equipment
The site is organised into dedicated workshops rather than one mixed floor. Each process has its own station and its own check, which is what keeps a 500-bed order consistent from the first frame to the last.
| Workshop / equipment | What happens | Why it matters to you |
|---|
| CNC laser tube cutting | Cuts steel tube to length and angle with repeatable tolerance | Consistent frame geometry across the batch |
| Drilling and punching jigs | Locates every hole from a fixed datum | Bolt holes align at assembly |
| CO2 shielded welding stations | Joins bed ends, ladders, guardrails and support rails | Structural strength, joint by joint |
| Grinding and deburring | Removes weld spatter and sharp edges before coating | Coating adheres evenly, no early rust |
| Multi-stage pretreatment line | Degrease, rinse, derust, phosphate, rinse | Corrosion resistance and coating adhesion |
| Electrostatic powder coating line | Applies polyester powder evenly, including corners | Uniform colour and film build |
| Curing oven | Cures the powder film to a hard finish | Scratch and wear resistance |
| Trial assembly and test area | First-off assembly, dimensional checks, load testing | Bulk order matches the approved sample |
Quality control: where we check, and what you receive
| Stage | What is checked | Documentation |
|---|
| Incoming (IQC) | Steel tube wall thickness, straightness and surface condition; check against the order specification before material reaches the line. | Mill certificate / incoming record |
| In process (IPQC) | Cut length, hole position, weld integrity, squareness of the assembled frame, coating thickness on the wet and cured film. | In-process inspection record |
| Final (FQC / pre-shipment) | Dimensions against approved drawing, finish and colour check, hardware count, packing quantity and carton marking. | Pre-shipment report, loading photos |
| Load testing | Bed frames load tested to 200 kg per berth. | SGS test report available on request |
Load test: bed frames are tested to 200 kg per berth. SGS test reports are issued on request and can be included in your tender or compliance pack — ask for the report with your quotation, not after you have placed the order.
Certifications and compliance
CE
Conformity for the European market
EN 747
Bunk beds — safety, strength and durability
EN 1725
Bed frames and mattresses — safety requirements
ISO 9001:2015
Documented quality management system
SGS
Independent third-party verification and testing
- Test reports and certificates supplied with the order file, on request at quotation stage.
- Structural and safety requirements reviewed against the destination market before production.
- Third-party inspection (SGS, BV, TUV) supported and hosted at the factory.
Dormitory mattresses, made in the same facility
Beds and mattresses from one supplier means one delivery, one set of documents and one party to call. We produce dormitory mattresses at 10 cm thickness and 28 kg/m³ density, with an optional PVC cover that wipes clean — the specification most institutional buyers ask for. Mattresses are compressed and roll-packed, which cuts the container volume they occupy and lowers the freight cost per unit.
How an OEM / ODM order runs
1
Enquiry
Send the drawing, specification, quantity and destination port.
2
Quotation and drawings
We price it, confirm the specification and flag anything that affects cost or lead time.
3
Sample
A sample is built to the agreed specification for your approval.
4
Bulk production
Production starts after sample approval, with in-process checks at each stage.
5
Inspection and reports
Final inspection, load test documentation and loading photos before dispatch.
6
Shipment
Container loaded and braced; packing list and documents sent before departure.
Why buy factory-direct from Zehao
One factory, one accountable team
Cutting, welding, coating and mattress production are in-house. No sub-contracted welding, no middleman margin, and one party answerable when something needs fixing.
27 years of metal bed manufacturing
Established in 1999. Long enough to have solved the problems that still catch newer suppliers out.
Certified, and documented
CE, EN 747, EN 1725, ISO 9001:2015 and SGS verification. Test reports supplied with the order file, not withheld until asked.
Built for institutional use
Dormitories, worker housing, correctional facilities, hostels and camps. Frames are specified for heavy daily use, not occasional guest use.
OEM and ODM supported
We build to your drawings and specifications, and support private-label programmes and project tenders.
Verify before you commit
Factory visits welcome, live video tours arranged, and third-party inspection (SGS, BV, TUV) supported at your cost.
Come and see it, or watch it live
We welcome factory visits, and we arrange live video tours for buyers who cannot travel — walk the cutting line, the welding floor and the coating line with a phone in hand. Third-party inspectors are hosted on site. If you would rather verify before committing, ask for a sample frame and the load test report together.
WhatsApp +86 155 1090 8182 · zehao@cntjzh.com
Frequently asked questions
Are you a manufacturer or a trading company?
We are a direct manufacturer. Cutting, welding, powder coating and mattress production are all done in our own facility in Hebei, China, so quality and pricing are controlled in-house.
Can I visit the factory?
Yes. Buyers are welcome to visit, and we arrange live video tours for those who cannot travel. Third-party inspectors are also welcome on site.
What is your production capacity?
More than 8,000 beds per month across a 20,000 m² facility. Capacity planning for large projects is confirmed against the order schedule before you commit.
What are your MOQ and lead time?
MOQ is 50 sets. Standard production runs 25-35 days depending on specification, quantity and finish. Project schedules are agreed in writing before deposit.
Do you load test bed frames?
Yes. Frames are load tested to 200 kg per berth, and SGS test documentation is available on request for tender and compliance submissions.
Can you match a colour or finish we already use?
Yes. Powder coating is supplied to the RAL colour you specify, and finish samples can be sent for approval before bulk production.
Do you supply mattresses with the beds?
Yes. We produce dormitory mattresses at 10 cm thickness and 28 kg/m³ density, with an optional PVC cover for easy cleaning. Mattresses are compressed and roll-packed to save container space.
Do you support OEM and ODM?
Yes. We manufacture to buyer drawings and specifications, support private labelling, and provide the documentation tenders require.
Ask for a quotation, a sample, or the test report
Tell us the bed type, size, quantity and destination port. We reply within one working day with specifications, pricing, lead time and a container loading plan.
