Quality Assurance Plan

A. Incoming Raw Material

Sr. No.  Process Description  Ref. Documents Standards  Characteristic to be checked  Samples quorum of size/inspection  Instrument equipment used for testing  Acceptance criteria 
1 S. S. Coils/ Seamless Pipe (Mother Hallow) Purchase Order/ Specification  • Dimension 
• T.C. Verification (Lab test Report) (if required) 
• Packing Condition 
• Weight 
• Defects if any 
Sample / Heat  Vernier, Micrometer, Chemical, Analysis, Tensile Testing Machine (Brinell Rockwell) Hardness Testing Machine  Confirm to Specification 100% 

B. Stage wise Inspection

Sr. No.  Process Description  Ref. Documents Standards  Characteristic to be checked  Samples quorum of size/inspection  Instrument equipment used for testing  Acceptance criteria 
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 .  
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