TIANJIN MILL · GREENHOUSE STEEL FRAMES · EXPORT
Greenhouse frames, priced by the tonne and cut to your drawing.
We roll, galvanise and pack the steel that holds the cover up: oval arch tube, round tube, cold-formed purlins, gutters and fittings. Tell us the span, the bay and the load case — we send back a frame schedule, a weight and a price.
- Max single length
- 16 m cut to order
- Tube outside diameter
- Ø6–1,200 mm
- Wall thickness
- 0.5–16 mm
- Reference projects
- 10 documented
Three ways buyers start
Most first enquiries arrive in one of three shapes. Pick the one that matches what you already have — each path ends at the same quotation.
You have a drawing
Send span, bay, eaves height, tube sections and quantities. Six numbers are enough to price a frame.
The six numbersYou have a drawingYou have a crop
Row spacing, crop support height and vent pattern decide the structure before the steel does.
Ten crop guidesYou have a cropYou have a site
Snow, wind, port and coating class change the section sizes and the packing plan.
Fourteen marketsYou have a siteWhat we actually make
Six families. They are sold separately and together, and every line on a quotation maps to one of them.
Round steel tube
Ø21–114 mm, wall 1.0–4.0 mm. Posts, bracing, crop-support wire frames.
9 sizesRound steel tubeOval arch tube
30×60 to 40×90 mm. The arch section most multi-span and tunnel houses are built on.
5 sectionsOval arch tubeSquare & rectangular
SHS/RHS for columns, door frames and truss chords where a flat face is needed.
5 sizesSquare & rectangularC / Z profiles
Cold-formed purlins, rails and posts, cut to bay length and punched to your pattern.
4 profilesC / Z profilesRoll-formed gutters
200–300 mm profiles with end caps and outlets for rainwater collection.
3 profilesRoll-formed guttersFittings & covering
Clamps, connectors, anchors, film clips, tape and vent hardware that make the frame a house.
12 itemsFittings & coveringWhat a quotation contains
A price alone is not a quotation. Ours is a small document you can hand to a purchasing officer or a site engineer.
Frame schedule
Every member: section, wall thickness, coating, length, quantity. Line numbers you can check against your drawing.
Weight and packing
Total tonnes, bundle plan, pieces per bundle, and the loading sequence for 20GP or 40HQ.
Price and delivery
Unit price, Incoterm, lead time from deposit, and the port we load from.
Documents
Mill certificate, packing list, invoice, and the certificate holder named exactly as on the PO.
What we do not put in a quotation
Film, motors, irrigation and climate computers are not in the frame price. They are quoted only when asked, and always as separate lines, so you can compare our steel against another supplier's steel.
- Arch section
- OV 60×30×2.0 mm
- Arch spacing
- 1.0 m on centre
- Gutter section
- Roll-formed 250 mm
- Purlin
- C 80×40×15×2.0
- Coating
- Pre-galvanised Z275 / hot-dip on request
- Steel grade
- Q235B / Q355B
- Bay length
- 4.0 m
- Covered area (example)
- 1,000 m²
- Frame weight
- ≈ 5.8 kg/m²
- Bundles
- ≈ 12
- Loading
- 40HQ, 2 sets
- Lead time
- 18–25 days
- Incoterm
- FOB Tianjin
Standards we build to — and the ones we do not claim
Technical buyers check three things before they trust a frame supplier: the tube standard, the coating class, and who signs the conformity paperwork. Here is our position on each, stated plainly.
| Item | Standard / document | Who holds it |
|---|---|---|
| Cold-formed hollow sections | EN 10219 (dimensional and mechanical properties) | Pufeng mill, per heat |
| Hot-dip zinc coating | ISO 1461 / ASTM A123 / GB/T 13912 — the PO should name one | Coating plant |
| Pre-galvanised coil | Z275 class (275 g/m² total coating) | Coil supplier |
| Greenhouse structural design | EN 13031-1 (commercial production greenhouses) | Your house designer |
| Snow actions | EN 1991-1-3 / local code | Your engineer |
| Management system certificates | AAA credit & contract certificates, held by Pufeng | Pufeng |
We supply members to the sections and coating classes your engineer specifies. We do not issue the greenhouse conformity certificate.
Where our frames go
Fourteen market pages carry the design and logistics notes that change a frame order: the load case, the port, the coating habit and the documents your customs broker will ask for.
- 01United Arab EmiratesJebel Ali · high humidity, no snow, coastal wind→
- 02Saudi ArabiaJeddah / Dammam · heat load and water reuse→
- 03KenyaMombasa · high-altitude hail and UV→
- 04UzbekistanRail via Khorgos · snow and continental swing→
- 05MexicoManzanillo · hurricane exposure on the Gulf side→
- 06United StatesHigh tunnels · imperial sections, NRCS-style specs→
Read next
Pages that answer the question this page raises.
- 04Product familiesGreenhouse steel product range: round tube Ø21–114 mm, oval arch tube 30×60–50×100, SHS/RH→
- 05System typesGreenhouse system types: multi-span film, single-span tunnel, Venlo glass, sawtooth polyca→
- 08.01Specify a frameHow to specify a greenhouse frame: span, bay, eaves, load case, covering, coating, fitting→
- 09.03FactoryGreenhouse frame factory in Daqiuzhuang, Jinghai, Tianjin: coil, forming, bending, punchin→
NEXT STEP
Price this against your take-off
Send the sizes, wall thicknesses and quantities you need. We reply with a line-by-line offer, bundle weights and the loading plan for your container.