| 1. RAW MATERIAL |
| 1.1 |
Seamless Mother Hollows |
| [A] Dimension |
Dimensional Measurement ( OD, THK ) |
As per Application STD. |
Micrometer OD & THK |
| [B] Surface |
Visual Inspection |
– |
Visual |
| [C] Chemical Checking |
Chemical check analysis |
As per Std. & P.O. Req. |
Spectrometer |
| [D] Mechanical Testing |
Tensile Testing (Yield st., U.T.S. & % EL.) |
As per approved STD. |
U.T.M machine |
| [E] Color Coding |
– |
Color code chart |
– |
| 2. IN PROCESS CONTROL |
| 2.1 |
Intermediate 100% Prod. & Q.C Dept. Heat Treatment |
| [A] Temperature |
Temp.Monitoring |
As per Std. & PO Req. |
Automatic Temp.Controller |
| [B] Speed & Feed Qty |
|
AC Variable Drive |
Automatic Temp.Controller |
| 2.2 |
Intermediate Pickling |
% of HCL,% of Fe. |
Titration method |
– |
Chemical Testing Lab by Titration |
| 2.3 |
Coating |
Acidity of Phosphating both Fe% |
– |
– |
Lab. |
| 2.4 |
Drawing |
| [A] Dimensions |
Dimensional Measurement ( OD, Thk, Length ) |
As per Std. & P.O Req. |
Micrometer OD, Thk & Measuring tape |
| [B] Surface |
Visual Inspection |
|
Visual |
| 2.5 |
Soap Bath |
% of Fatly Acid |
– |
– |
Chemical Testing Lab. |
| 2.6 |
Heat Treatment |
| [A] Temperature |
Temp. Monitoring |
As per Appro. Std. & P.O Req. |
Automatic Temp. Controller |
| [B] Speed & Feed |
|
Depends on Tubes OD & Thk |
A.C. variable Drive |
| [C] Mechanical Testing |
Tensile Testing / Hardness Checking |
As per Appro. Std. & P.O Req. |
U.T.M. Machine / Rockwell superficial hardness tester & Rockwell hardness Tester |
| 2.7 |
Pickling |
HCL % & Fe % |
– |
– |
Lab. |
| 2.8 |
Straightening |
| [A] Dimensions |
Dimensional Measurement ( OD, Thk, Length ) |
As per Std. & P.O Req. |
Micrometer OD, Thk & Measuring tape |
| [B] Surface |
Visual Inspection |
– |
– |
| 2.9 |
End Cutting |
Length Checking |
Length check by measuring tape |
As per P.O Req |
Lab. |
| 2.10 |
Hydro Testing |
Pressure Testing by keeping of pressure for minimum of 5 seconds. |
Hydrostatic test |
As per Std. & P.O Req. |
Hydrostatic test Bench |
| 2.11 |
Eddy Current( If applicable) |
Surface & sub surface condition |
E.T Method(Non Destructive test) |
ASTM –A 450/ E-309 |
Off line eddy current testing machine |
| 2.12 |
Mechanical Testing for Mechanical Properties |
| [A] Tensile |
U.T.S., Yield ST & % El |
As per Std. & P.O Req. |
U.T.M M/C |
| [B] Hardness Testing |
Hardness testing |
As per Std. & P.O Req. |
Rockwell superficial, Rockwell Hardness Tester |
| [C] Flaring, Flatting bend testing |
– |
As per Std. & P.O Req. |
– |
| [D] Impact Testing |
– |
As per Std. & P.O Req. |
Impact Testing Machine |
| 2.13 |
Ultrasonic Testing( If applicable) |
Sub surface condition |
Non Destructive testing by U.T. method |
ASTM –E 213& P.O Req |
Ultrasonic testing machine |
| 2.14 |
Chemical Testing |
| Product analysis |
Chemical check analysis |
As per Std. & P.O Req. |
Spectrometer |
| P.M.I machine |
Spectrometer |
| 2.14 |
Final Cutting |
Length |
length measurement by measuring tape |
As per Std. & P.O Req. |
Measuring Tape |
| 3. FINAL INSPECTION |
| 3.1 |
Visual Dimensional |
| [A] Dimensions |
Dimensional Measurement (OD, Thk, Length ) |
As per app. Std. |
Micrometer OD, Thk & measuring tape |
| [B] Visual ( Surface ) |
Straightens,End cuts surface checking |
– |
– |
| 3.2 |
Identification |
Product marking |
Stenciling & testing |
As per app. Std. |
Marking M/C,marking slates |
| 4. PACKING |
| 4.1 |
Packing |
Product delivery condition |
Visual |
– |
– |
| 5. DOCUMENTATION |
| 5.1 |
Final documents |
Compliance to quality system procedure, P.O. Req. & appli. TDC Req. |
Verification and Review |
As per quality system procedure & PO Req. (Material Test certi.) |
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