Production Process

Production Process of Stainless Steel Seamless Pipe

Process Control
A: Self-inspection & Intercross Check
B: Pre-inspection for semi-finished Pipes
C: Mechanical Test after heat treatment
D: Auto Controlled Heat Treatment Furnace-stable & Pollution-prevented

Raw Material Bars - Production Process

Raw Material: Bars

 left - Production Process
Chemical Analysis - Production Process

Chemical-Analysis

left - Production Process 
Peeled Cutting - Production Process

Peeled&Cutting

        down - Production Process 
Inspection - Production Process

Inspection

  right - Production Process 
Hot Piercing - Production Process

Hot-Piercing

 right - Production Process
Heating - Production Process

Heating

 down - Production Process      

Cold Pilgering - Production ProcessCold-Pilgering

 left - Production Process
Cold Drawning - Production ProcessCold Drawning

left - Production Process 
Solution Annealed - Production Process

Solution-Annealed

         down - Production Process
Pickling - Production Process

Pickling

 right - Production Process

Pipe For Inspection - Production ProcessPipe For Inspection

 right - Production Process
Straightening - Production Process

Straightening

 down - Production Process        
Final Cutting - Production Process

Final Cutting

  Quality Control
A: Raw Material: Pipe billet after Hot Piercing

B: Inspection: Chemical Composition
; Dimension Measurement; Outer & Inside Surface Vision
 down - Production Process        
Spectrograph Testing Surface Inspection Inside Inspection OD Meansurement
 Spectrograph Testing - Production Process  Surface Inspection - Production Process  Inside Inspection - Production Process  OD Meansurement - Production Process
WT Measurement Length Measurement Hydrostatic Testing Ultrosonic Testing
 WT Measurement - Production Process  Length Measurement - Production Process  Hydrostatic Testing - Production Process  Ultrosonic Testing - Production Process
Eddycurrent Testing Intergranularcorrosion Metallographic Testing Hardness Testing
 Eddycurrent Testing - Production Process  Intergranularcorrosion - Production Process  Metallographic Testing - Production Process  Hardness Testing - Production Process
Mechanical Property Chemical Analysis Printing Marks Bundle Packing
 Mechanical Property - Production Process  Chemical Analysis 1 - Production Process  Printing Marks - Production Process  Bundle Packing - Production Process
Wooden Packing Loading    
 Wooden Packing - Production Process  Loading - Production Process    

Inspection for Finished Products
A: Dimension Measurement

B: Outer & Inner Surface Inspection
C: Chemical Composition: Chemical Ana
lysis; Portable Spectrometer

D: Mechanical Properties: Flattening, Flaring, Hardness; Tensile Strength
E: Non-destructive Test: Eddy Current Test; Ultrasonic Testing;
F: Corrosion Test: Intergranular Corrosion Test; Pit Corrosion Test

G: Hydrostatic Test

H: Grain Size Test


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