Winture is a leading manufacturer of solar mounting structures and power transmission towers.
300,000 MT
Monthly Production Capacity
20 GW+
Solar Projects Installed Globally
1000,000 MT
Steel Products Delivered Worldwide
ISO certified
60,000m² / 30,000MT
90% CNC automation rate
99.999% pure zinc
100% Traceability:
The Winture Quality Guarantee
From the first coil entering our facility to the last bundle leaving it
— every stage is inspected, documented, and traceable.
Quality Management
Most steel fabricators have a quality management system. The difference is whether it runs on paper or on the production floor. Winture's quality system operates at four mandatory inspection gates — IQC, IPQC, FQC, and OQC — each with defined acceptance criteria, documented in our internal quality management system, and supported by in-house laboratory testing at every stage where material properties are at risk. The documentation generated at each gate is provided to customers with every delivery — not available on request, but standard output.
The system is certified to ISO 9001 and audited annually by an accredited third-party certification body. It covers both our solar mounting structure and power tower production lines under a single integrated quality management framework.
IQC
Incoming Quality Control
IPQC
In-Process Quality Control
FQC
Final Quality Control
OQC
Outgoing Quality Control
Every batch. No exceptions.
All raw materials — steel coils, angle steel, fasteners, zinc ingots, and coating materials
— are inspected at intake before entering the production floor.
No material is released to production until IQC clearance is issued.
What is inspected:
|
Inspection Item |
Method |
Acceptance Standard |
|
Chemical composition |
OES optical emission spectrometer |
Per grade specification (Q235B/Q355B/ ASTM A36, etc.) |
|
Yield strength |
Universal testing machine(tensile test) |
Per grade specification |
|
Tensile strength |
Universal testing machine |
Per grade specification |
|
Elongation |
Universal testing machine |
Per grade specification |
|
Charpy impact toughness |
Impact testing machine |
For low-temperature service grades |
|
Coating weight (coils) |
Gravimetric or magnetic method |
Per ZAM / GI specification |
|
Dimensional tolerance |
Caliper, gauge, micrometer |
Per production drawing |
|
Surface quality |
Visual inspection |
No cracks, delamination, inclusions |
Output: IQC Inspection Report with test data, material batch number, and release sign-off.
Provided to customer with delivery documentation.
Real-time monitoring at every production stage.
IPQC covers all active manufacturing stages: coil slitting, cold forming, CNC punching, stamping, welding
(where applicable), and pre-galvanizing surface preparation. IPQC checkpoints are defined in Winture's
Standard Operating Procedures (SOPs) for each production process.
Solar mounting structure — IPQC checkpoints:
|
Production Stage |
Inspection Item |
Frequency |
|
Slitting |
Width tolerance, edge quality |
Per coil |
|
Cold forming |
Section geometry, flange angle, web flatness |
Every 2 hours per line |
|
CNC punching |
Hole diameter, hole spacing, hole position |
Every 100 pieces |
|
Stamping |
End dimension, deformation |
Every 50 pieces |
|
Pre-galvanizing |
Surface cleanliness, acid pickling completeness |
Per batch |
Power tower — IPQC checkpoints:
|
Production Stage |
Inspection Item |
Frequency |
|
CNC punch-cut |
Member length, hole diameter, hole spacing |
Per member type per batch |
|
Angle adjustment |
Member straightness (max bow sL/1000) |
Per member |
|
Welding (if applicable) |
Weld size, penetration, visual quality |
Per weld joint |
|
Pre-galvanizing |
Surface cleanliness |
Per batch |
|
Trial assembly |
Bolt hole alignment, connection node fit-up |
Per tower type |
Nothing ships without passing final inspection
FQC is performed on 100% of finished product batches after galvanizing and before packaging. For
transmission towers, FQC includes post-trial-assembly dimensional sign-off in addition to coating inspection.
Final check before the container is sealed.
OQC verifies that the product leaving our facility matches the customer's order specification
— correct quantities, correct piece marks, correct packaging, and complete documentation.
Solar Mounting Structures Production Process
Power Towers Production Process
