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 . 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