Torich GB/T13793 Q195 Welded Steel Tube ERW Precision Steel Tube

Surface Quality:

Cracks, scarring, folding, layering, lap welding and overburning defects are not allowed on the internal and external

surfaces of steel pipes. Scratches, weld dislocations, burns, oxide skin and external burr removal marks not greater

than the negative deviation of wall thickness are allowed.

Tests Catogeries

A. Melting analysis

B. Finished product analysis

C. Tensile test

D. Weld tensile test

E. Impact test

F. Flattening test

G. Bending test

H. Flaring test

I. Hydraulic testing

J. Ultrasonic testing

K. Eddy current testing

L. Galvanizing coating uniformity testing

M. Galvanizing coating weight testing

N. Galvanizing coating adhesion test

Special Requirements

shall be negotiated by both parties and indicated in the contract.

The demander may choose from the following requirements :

A) hydraulic test;

B) Manufacturing accuracy;

C) Pipe end state;

D) Remove internal burrs;

E) Galvanized layer weight;

F) Other requirements.

Product Display:

Company Introduction:

Quality Control:

1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing and Cold Rolling, on line inspection
5. Heat Treatment, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8. Packing and Stocking.

100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.

FAQ: