| 2 |
I Welded Tube forming & Welding II Seamless Cold Drawing |
As per Work order / Specification |
Dimensions check Diameter (Ovality) x Length x Thickness • Weight • Defects if any |
3 Samples from each Coil 1 Sample from each lot |
Universal testing machine UIN 40 - T Make “UTS” Microscope, Vernier, Micrometer & Measuring Tape |
Dimensions acceptance as per order Confirm to standard samples as per details |
3 |
Annealing |
Temperature as per ASTM Standard |
• Temperature • Hardness • Cooling • Water Quenching |
1 Sample per lot / 1 Sample per heat |
Digital Graphic, Temperature Recorder, Digital Temperature Indicator & Temperature Controller, Metallurgical Microscope, Brine Rockwell Hardness Tester . |
Dimensions acceptance as per order Confirm to standard samples as per details |
4 |
Straightening |
Straightening as per specification |
Check straightening of Pipes & Tubes |
First 2 pipes of each size lot |
Roller Straightening Machine, Micrometer, Visual Observation |
Straightening as per specification standard sample |
5 |
End Facing Squaring & Beveling |
Burr Free Squaring / Beveling with Proper V-Shape |
100% Visual inspection |
Abrasive Polishing as per standard sample |
Confirm to specification / requirement |
Straightening as per specification |
6 |
Hydrostatic Testing |
As per ASTM standard |
Leakages |
100% |
Hydraulic Pressure Tester |
No Leakage |
7 |
Picking |
As per required ASTM standard |
• Scale removing inside • outside surface area |
100% |
Visual Observation requirement |
Confirm to requirement |
8 |
Final Inspection Physical / Chemical Testing |
As per applicable standard |
Visual Dimension, Physical & Chemical |
100% (or) as per ASTM standard |
Micrometer, Vernier, Universal Testing Machine, Molly Detector & Caron sampling at random spectra / wet method |
Confirm to requirement |
9 |
Marking (as per) customer requirement / standard marking |
As per requirement |
• Spell check • Details verification |
100% Confirm on first two sample & continue |
Inkjet machine / Electro Etching co-relation of heat no size Grade etc. with Test certificate |
Confirm to requirement |
10 |
Packing & Delivery |
As per customer requirement |
Packing quality Tightness of packing |
100% confirm to requirement and release for |
Box Crate, Polythene, Hessian Cloth |
Packing confirm to customer requirement |
