Weifang Sainpoly Greenhouse Equipment Co., Ltd.

1. Service Overview
One-Stop OEM/ODM Greenhouse Manufacturing — Your Brand. Our Factory.

With over 25 years of deep involvement in the greenhouse industry, Sainpoly has grown from a greenhouse parts factory into a commercial greenhouse system provider that integrates R&D, manufacturing, customization, installation and after-sales service. Backed by a 32,000㎡ in-house manufacturing center and a 90% self-production rate, we provide OEM (contract manufacturing) and ODM (design + manufacturing) services to greenhouse brands, distributors, importers, agricultural engineering companies and government projects worldwide — delivering greenhouse products and complete systems under YOUR brand, built to YOUR target market's standards.

2. Why Sainpoly
Strength    Details
Industry Experience    Founded in 1997, 25+ years in greenhouse R&D and manufacturing
Manufacturing Center    32,000㎡ in-house factory with robotic welding, laser cutting and automatic stamping lines
Production Capacity    Annual capacity of 100 hectares of greenhouse materials; handles volume orders
Self-Production Rate    90% of core products self-produced — quality and lead time under control
Technology & Certifications    15 national utility model patents; CE certified products
Export Experience    Pioneer of greenhouse export in Weifang since 2014; shipped to 80+ countries
Customer Base    9850+ cooperative clients across USA, France, Saudi Arabia, UAE, Japan, Uzbekistan and more
Foreign Trade Capability    16 years of overseas project experience; familiar with EU, Middle East and Central Asia import standards and export documentation
Key Selling Points:

Direct supply from our own factory — no middlemen, cost under control
90% self-production rate — quality traceable to every process step
Hot-dip galvanized anti-corrosion treatment with traceable coating thickness, meeting export standards
CE certification + 15 patents — our technical strength backs your brand
3. OEM Service (Contract Manufacturing to Your Specifications)
What We Offer
We manufacture products that meet your standards — per your specifications, drawings or samples — and deliver them under YOUR brand:

Specification Manufacturing: Produce greenhouse frames, covering components and supporting systems per your drawings/parameters
Brand Customization: Laser-engraved / screen-printed logos, nameplates and labels
Packaging Customization: Packaging style, shipping marks and instruction manuals in your required language
Market Standard Adaptation: Adjust processes and components to target market standards (EU, Middle East, Central Asia, North America)
Trial Production: Small-batch trial orders supported for the first order to validate before scaling up
Who It's For
Greenhouse brands, overseas distributors, importers, building material suppliers and agricultural engineering companies — you already have a product solution and need a stable, high-quality manufacturing supply.

4. ODM Service (Design + Manufacturing, From Concept to Delivery)
What We Offer
Based on your requirements and target market climate, we design the product solution for you and complete the manufacturing:

Structural Design: Design span, bay, eave height and covering material selection based on local climate (wind load, snow load, temperature), crops and budget
Complete Drawings: Full CAD construction drawings, load calculation reports and BOM lists
System Integration: Integrated design of shading, ventilation, cooling, heating, bench, fertigation and environmental control systems
Custom R&D: Develop adapted solutions for extreme climates and special crops (blueberries, tomatoes, flowers, seedling nursery, hydroponics, aquaponics, etc.)
Optimization & Upgrades: Improve and upgrade existing product series (e.g. snow-resistant, heat-resistant, wind-proof Venlo variants)
From 0 to 1: Brand naming and product positioning advice available (depending on project depth)
Who It's For
Customers looking to build their own branded greenhouse product line or enter new markets; overseas clients needing local adaptation (climate, crop types); government agricultural projects and large-scale farming enterprises.

5. Product Range Available for OEM/ODM
Greenhouse Structures (by type)
Category    Customizable Options
Venlo Greenhouse    Single-layer glass / double-layer insulated glass; snow-resistant, wind-proof, heat-resistant variants
PC Panel Greenhouse    Gothic PC panel, multi-span ridge full-PC greenhouses
Gothic Greenhouse    Gothic film / PC panel designs engineered for snow and wind
Multi-Span Greenhouse    Custom span, bay, eave height and covering material (PO film / PC panel)
Film Greenhouse    Multi-span film, ground-inserted film, tunnel mobile greenhouses
Special-Purpose Custom Greenhouses    Energy-utilizing, environment-adaptive, container smart greenhouses
Supporting Systems (sold separately or as complete packages)
Shading systems: internal / external / motorized / manual
Cooling systems: fan & pad / misting
Heating systems: water / air / electric
Bench systems: mobile / fixed / ebb & flow
Hydroponic systems: NFT / DWC / aquaponics / hydroponic towers / rolling benches
6. Customization Scope
Dimension    Description
Structural Specs    Span, bay, eave height, length, wind/snow load ratings
Covering Materials    Float glass / insulated glass / PC panels / PO film, selected by climate and budget
System Configuration    Free combination of shading, ventilation, fan & pad, heating, benches, fertigation and environmental control
Branding    Logos, nameplates, labels, screen printing / laser marking
Packaging & Delivery    Packaging style, export shipping marks, multi-language manuals and marketing materials
Design Output    CAD drawings, load calculation reports, installation guide manuals, BOM
Component Standards    Profiles, fasteners and seals configured to target market standards
7. Workflow

① Inquiry & Requirements → ② Proposal & Quotation → ③ Drawing/Sample Confirmation → ④ Contract
→ ⑤ Manufacturing & Quality Inspection → ⑥ Packaging, Delivery & After-Sales
Inquiry & Requirements: Submit your product requirements, drawings, target market and crop information
Proposal & Quotation: We reply with an initial proposal and quotation within 24-48 hours
Drawing/Sample Confirmation: Confirm structural drawings, material specs, branding and packaging; small-batch trial production supported for the first order
Contract: Clarify specifications, lead time, payment and quality terms
Manufacturing & Quality Inspection: Standardized production lines, full-process inspection, traceable galvanizing thickness, final inspection before shipment
Packaging, Delivery & After-Sales: Export-standard packaging, export documentation assistance, installation guidance and technical support
8. Quality Assurance
Full-Process Inspection: Incoming material inspection → in-process inspection → post-galvanizing inspection → final pre-shipment inspection
Hot-Dip Galvanizing: All steel components hot-dip galvanized for corrosion protection, with traceable coating thickness
CE Certification: Products comply with EU standards, meeting export requirements
Patented Technology: 15 utility model patents covering shading, ventilation, drainage gutters, frame support and other core processes
Traceability System: Batch management — any quality issue can be traced to the production stage
9. Delivery & Export Support
Export-Standard Packaging: Steel components strapped and protected to sea/land freight standards; fragile parts individually packed
Export Documentation Assistance: Packing lists, commercial invoices, certificates of origin and other documents supported
Multi-Language Materials: Manuals and marketing materials available in English, Russian, Arabic and more (subject to project confirmation)
Installation Support: Installation drawings and video guidance provided; on-site engineer supervision available for overseas projects (subject to project confirmation)
10. FAQ
Q1: What is the minimum order quantity (MOQ)? A: It depends on the product type. Frame products can start from a single greenhouse; system and accessory items can be negotiated per batch. Small-batch trial production is supported for the first order.

Q2: How long does drawing or sample confirmation take? A: Standard solutions take 3-7 days to deliver full drawings and quotations. Complex custom projects (special-purpose greenhouses) depend on technical complexity.

Q3: Can you manufacture to our drawings? A: Yes. Provide your drawings or detailed parameters, and we will review them free of charge and offer process optimization suggestions.

Q4: Can we use our own brand and packaging? A: Yes. Logos, nameplates, labels, packaging and manuals can all be customized to your brand.

Q5: Can you adapt to our country's climate standards? A: Yes. We have delivered projects in 80+ countries and can verify and adapt structures for wind load, snow load, high temperature, high humidity, sandstorms and other climate conditions.

Q6: What is your lead time? A: Standard orders take 15-30 days (depending on specifications and volume); special-purpose custom orders follow the contract terms.

Q7: Do you provide installation and after-sales support? A: Yes. Installation drawings and video guidance are provided, and installation teams or engineers can be dispatched for major overseas projects.

11. Contact
Weifang Sainpoly Greenhouse Equipment Co., Ltd. (Sainpoly Greenhouse)

Please submit: product requirements / drawings / target market / crops / target quantity
Response time: proposal and quotation within 24-48 hours
Cooperation talks: factory visits, video factory inspections and sample confirmation welcome
This proposal is compiled based on Sainpoly's official information: company profile (founded 1997, 32,000㎡ manufacturing center, 90% self-production rate, 100-hectare annual capacity, 80+ export countries, 9850+ clients, 15 patents, CE certification) and product classification system.

Support customized

Professional design team and production team

Delivery on time

Weifang Sainpoly Greenhouse Equipment Co.,Ltd, is located in the Qili Street 5555, Economic Development Zone, Qingzhou City, Shandong Province, 

which is hailed as " the Most Important Town for Flowers in Northern China".

We are majoring on the greenhouse materials manufacturer, sales and techinical services.

We are engaging in the advanced greenhouse projects and designing.

We are also a professional greenhouse supplier in providing all kinds of systems and their materials.

More and more companies have built up a cooperation with our company based on the advantages of the quality and price of our products.

We have sold to more than 70 countries, such as America, Canada, Australia, France, Bulgaria, Greece, etc.

Free consult service before order

Free design and installation layout

Longlife after-sale service 

Free installation guidance on line service

1-year free warranty after installation