Capabilities
Machining, welding, galvanising, moulding and assembly under one group of factories — with the inspection paperwork to go with it.
01Process
Five steps, no surprises.
Every custom order follows the same route. The times are the ones we plan against, not the best case.
Drawing review
Tolerance stack-up, material grade, lifting angle and coating are checked against the drawing. Open questions go back in writing.
Process design
Machining route, tooling, fixtures and inspection plan. Quoted with a realistic lead time, not a hopeful one.
First article
Sample with a dimensional report. Nothing runs in volume until you have signed it off.
Production
Batch cards travel with the parts. In-process checks every two hours, photos on request.
Inspection and packing
AQL 1.0 final inspection, then packing for sea freight with a packing list and loading photos.
02Shop floor
What the factories can do.
Three bases in Zhejiang, each with its own specialism, sharing one inspection standard.
CNC turning and milling
12 units · ±0.02 mm
Automatic welding
2 cells · MIG / TIG
Hot-dip galvanising
Line · 70 µm class
Punch presses
25–160 t
Injection moulding
80–400 t
Metrology and lab
CMM · salt spray · load rig
03Quality
Records, not promises.
Inspection is not a final gate. Each of these points has an owner, a record and a limit that cannot be waived by the sales team.
Batch records
Kept for five years, retrievable by order number.
Third-party testing
SGS / TÜV on request, at cost.
Written limits
If a batch does not pass, it does not ship — whatever the promised date.
04Inspection
Where we check, and what we keep.
Incoming steel
Mill certificate checked against the heat number, plus a spectro test on every coil.
In process
First article plus a patrol every two hours; dimensions logged on the batch card.
Coating
Thickness at five points, then 480 h neutral salt spray on a coupon per batch.
Load
Proof load at 3× working load on a sample from each lot, with the curve kept on file.
Final
AQL 1.0 visual and dimensional inspection before the carton is sealed.
05Documents
What travels with the container.
Material certificates, load-test reports, coating thickness records and the packing list are issued with the shipping documents. The quality management system is certified to ISO 9001:2015 — certificate 79426Q00151R0374, valid until 4 August 2029.
Document 01 — accredited system
ISO 9001:2015
Quality management system
IssuerQide Certification
Certificate no.79426Q00151R0374
ValidityValid 2026-08-05 → 2029-08-04
Sales of building materials (embedded parts: anchor bolts, precast concrete lifting anchor)
View certificate
Click any document to read the full certificate.
Questions buyers ask us
The four questions that come up in every RFQ. Anything else — send a drawing.
Which certificates does LSW hold?
ISO 9001:2015 certificate 79426Q00151R0374 (valid to 2029-08-04) and four CNIPA utility model patents on the dry raised floor system.
Is there third-party test data?
Yes: SGS REACH SVHC screening (report NGBHL23004945901), GQT raised floor testing to GB/T 36340-2018, and Ningbo QTI adjusting screw testing to GB/T 7314-2017.
How are batches traced?
Every batch carries a record kept for five years, retrievable by order number.