Gaomi Wantai Steel Structure Engineering Co., Ltd.

Quality Philosophy

WANTAI attaches great importance to the quality control of welding structures. For each engineering order, our senior welding engineers and quality inspectors work together with customers and partners to carry out and complete each step of quality control, and carry out all the testing content listed in the ITP. Our work complies with the international standard quality management system ISO 9001:2008 and the needs of different customers

Inspection content and steps

Raw material and production testing

Dimensional inspection, welding material and weld inspection, trial assembly test
nondestructive testing

Ultrasonic testing, liquid testing, magnetic particle testing, and radiographic testing
Surface treatment and spraying standards

Surface roughness, shot blasting, DFT measurement, molten salt corrosion test, adhesion test

Process flow diagram

01

Raw materials and consumables

Visual inspection
Factory inspection form and furnace batch number inspection
Dimensional inspection

Cutting and discharging

Raw material labeling
Material discharge
Heat number and other markings
Dimensional inspection

Welding, tooling, and drilling

Curled edge
Trimming edge
Beveling processing
Component assembly
correction
size
02

Welding: arc welding, gas shielded welding

Welding material re inspection
Pre heating
WPS, Welding Procedure Qualification
Welder certificate
Welding dimensions and continuity
Non destructive testing
heat treatment

Final inspection: size, sandblasting, galvanizing, painting

Verify the dimensions again according to the drawings
Shot blasting and spray re inspection
Sandblasting surface contour
Carving coating
Paint material and factory inspection form
Spray quality and appearance testing