S. No |
Product |
Operation/ Stage |
Checking Parameter |
Method of Checking
|
Sample Size |
Frequency |
IMTE Used |
Acceptance Criteria |
1. |
Pipe Fittings |
Casting |
Dimensions |
Manual |
2 pcs / item |
Daily |
Vernier Calliper |
As per SS . QFM
/ QC /
01 |
Wall thickness |
Manual |
2 pcs / item |
Daily |
P– type Caliper |
As per SS . QFM
/ QC /
01 |
Cracks |
Visual |
100%/item |
Daily |
-------- |
No cracks |
Unfilled |
Visual |
100%/item |
Daily |
-------- |
No unfilled |
Deep pits |
Visual |
100%/item |
Daily |
-------- |
No deep pits |
Shifting |
Visual |
100%/item |
Daily |
-------- |
No shifting |
Deposits |
Visual |
100%/item |
Daily |
-------- |
No deposits |
Chemical Test |
Carbon contents |
Lab Test |
10 – 20 gms |
Once in 4 months |
Lab. test (outside) |
2.7 – 3.2 % |
Silicon contents |
Lab Test |
10 – 20 gms |
1st & 3rd Heat |
Lab test |
0.8 – 1.2 % |
Heat Treatment |
Temperature |
Manual |
Each Furnace |
Each C.U. No |
Pyro – meter |
Min.850°C ,Max 950°C
for 24 hrs |
Compression Test |
Malleability |
Bench vice |
9 pcs |
Each C.U. No. |
Vernier Calliper |
5 % upto 2" Ø & 3 %
above 2" Ø |
Mechanical Test |
Elongation / UTS |
Out side agency |
3 pcs test bar |
Each C.U.No. |
Tensile testing m/c |
Min.6%@ 300 Mpa IS:
14329 - 1995 |
Stone Grinding |
Unwanted material |
Visual |
100 % / item |
Daily |
---------- |
Free from unwanted
material |
Shot Blasting |
Surface cleaning |
Visual |
100 % / item |
Daily |
---------- |
Free from rust etc. |
Galvanizing |
Mass of Zinc Coating |
Dip Test |
3 pcs / C.U No |
Daily |
Lab test |
Min.610 gms / m² IS:
4759 – 1979 |
Zinc Coatings |
Surface smoothness |
Visual |
100 % / item |
Daily |
---------- |
Smooth surface |
Flux ash |
Visual |
100 % / item |
Daily |
---------- |
No flux ash |
Bare patches |
Visual |
100 % / item |
Daily |
---------- |
No bare patches |
Pimples |
Visual |
100 % / item |
Daily |
---------- |
No pimples |
Lumps |
Visual |
100 % / item |
Daily |
---------- |
No lumps |
Rust strains |
Visual |
100 % / item |
Daily |
---------- |
No rust strains |
Excess / less deposits |
Visual |
100 % / item |
Daily |
---------- |
No excess / less
deposits |
Chamfering |
External / Internal threads |
Visual |
5 pcs / item |
Hourly |
---------- |
No item without chamfer |
Machining |
Threading |
Manual |
5 pcs / item |
Hourly |
Thread Gauge |
± 1¼ thread as per
IS: 8999 – 1979 |
Damaged threads |
Visual |
5 pcs / item |
Hourly |
---------- |
No damaged threads |
Alignment Test |
Straightness / 90° |
Manual |
5 pcs / item |
Hourly |
Jigs |
180°± ½°, 90°± ½° IS :
1879 – 1987 |
Pneumatic Test |
Air–leakage |
Compressed air |
13 pcs / item |
Daily |
Pressure dial gauge |
No leakage @ 10 Kg/cm²
IS : 1879 – 1987 |
Hydrostatic Test |
Water–Leakage |
Hydraulic pump |
13 pcs / item |
Daily |
Pressure dial gauge |
No leakage @ 21 Kg/cm²
IS : 1879 – 1987 |
Barrel |
Oily-surface cleanliness |
Visual |
100 % / item |
Daily |
---------- |
Free from oil |
Remarks :- 1. All dimensions are in mm. unless
otherwise specified.
2. Calibrated instruments are used for
inspection.
3. 100% pneumatic test is performed for gas
fittings only. |