| Sr.No. |
Process Operation |
Quality Characteristics |
Method Of Control |
| 1 |
Raw Material (Strip) |
1> Dimensions
2> Chemical analysis
3> Control of Slit which within specified limits
4> Surface |
Actual measurement as per Std.
Analysis of all elements as per Std
Testing as per various Std.
Measurement of width, thickness & recording visual inspection. |
| 2 |
Tube Mill (GTAW Type) |
1> Weld Test, Flare Flanges, Flattering Reverse
bend & Reverse Flattening.
2> Inspection of weld, seam
3> Dimensions
4> Surface |
Testing as per ASTM specification & recording
the result. One test for every 30 to 35 Mtrs. Visual inspection
weld zone. O.D. , Thickness & Length.
Check roller surface profile& finish. |
| 3 |
Solutions Annealing (At Min. 1040 C)
With continuous water quenching. |
1> Temperature
2> Hardness
3> Micrometer |
Automatic Relay Temp / Controller Adjusted to
present level. Measurement of hardness as per Std. one Test
/ Lot / Heat |
| 4 |
Straightening |
Straightness OD Surface Finish |
Adjust roller setting measure visual |
| 5 |
Cutting |
Square cut Length |
Right angle to length, visual |
| 6 |
Deburing |
Burs removel On OD and ID Edges |
Visual |
| 7 |
Chemical Treatment
a) Pickling
b) Passivation
c) Bath |
Concentration
Concentration
Temperature |
One Test / Bath Day
One Test / Bath Day
Temperature |
| 8 |
Hydrostatic Pressure Test |
Test Pressure |
100 % Inspection at test pressure specified
as per ASTM Std. |
| 9 |
Final Inspection |
IGC Test Dimensions Surface Physical Testing
Grade Check
Product Analysis |
As per standard 100 % inspection of Dimensions
as specified.
Visual Inspection for surface defects, Physical Testing and
Chemical analysis as per ASTM standards. |
| 10 |
Marketing |
Marking as per Std. |
Check for proper marking |
| 11 |
Packing |
Seaworphy Packing / Wooden Cart |
Check for packing, Quantity, shipping mark, |
