krystalsteel pipes
Manufacturer & Exporter of - Seamless Stainless, Duplex & Nickel Alloy Tubes, Pipes & U Tubes & Fittings
 
Quality & Testing @ Glance
 
The Quality Control Department is independent of manufacturing shop. All Tests are carried out by trained quality personnel in compliance with the guidelines of Quality Assurance System. To strengthen the hands of quality personnel, we have equipped our laboratory & shop floor with necessary testing machines such as Hydro Testing Machine up to 5500psi, Air under water testing, on-line & off-line Eddy Current Tester, Ultrasonic thickness Tester, UTS, Hardness Tester, Inverted Metallurgical Microscope with optics & CCD camera, Electro Etching Machine, Carbon - Sulphur Apparatus, Spectro & PMI for Chemically Assured Products etc.
Hydrostatic Test 3.175 mm OD to 219 mm OD
Pneamatic Test (Air Under Water) 6 mm OD to 50.8 mm OD Up to max 200 PSI
NDE - Ultrasonic Test (UT) 15.88 mm OD to 323 mm OD Up to 15 mm Thickness
NDE - Eddy Current Test (ECT) Up to 76.2 mm OD
Ultrasonic Thickness Guages Up to 15 mm (Digital)
Spectroscope Spectromax
Possitive Material Identification (PMI) Niton
Corrosion Testing Laboratory Glasswares to test
IGC Pr. A & E acc. ASTM A 262 & EN ISO 3651 / 2
Tensile
Flange / Flare
Flattening / Reverse Flattening
Bend Test
UTE 40-FIE Make
(with Extenso meter)
Hardness Test Twin Hardness Tester, RAB-SAROJ make
Micro structure Analysis
& Grain size examination
Polishing Machine
Electro Etching Machine
Inverted Metallurgical Microscope
with Optics & CCD camera
Dimensional Checking Measuring Instruments- Digital Vernier calliper, Flat & Ball
Micrometer etc of Mitutoyo Make
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Certifications

QA / QC Parameters

Manufacturing Process of Stainless Steel - Straight & "U" bending
   
   
Process
  Quality Assurance Parameters
   
Raw Material Selection - 100% PMI, 10%ECT, Spectro / Physical / Micro as per specification
   
Coating - Visual
   
Soaping (Stearic Acid) - Visual
   
Pointing - Visual
   
Cold Drawing / Pilgering - Dimensions (OD/Thk/Length), Visual for Die / Plug markings, scoring, pitting etc
   
Heat Treatment - Physical, Mechenical & Metallurgical Properties as per PO / Applicable Specifications
   
Straightening - Visual / Straightness across the length
   
Cutting - Straight length Cutting / Leg length
   
Deburing - Visual
   
Acid Pickling Passivation - Visual
Quality Control Parameters   Straight Length Process   "U" Bend Process   Quality Control Parameters
             
Water leak pressure test
as per PO / specs
- Hydro   NDT
before U Bending
- To detect surface imperfections, scratches and minute defects in acc to applicable code
         
Visual - as per PO /
applicable specs
- Visual Dimension
Inspection
  Stress Reliving - Heating & Soaking temperature,
Hardness & Ovality check
           
To detect surface imperfections, scratches and minute defects in acc to applicable code - NDT
(Eddy current / Ultrasonic)
  D P - Surface defects & imperfections
         
As per specs & PO - Marking   Hydro - Water leak pressure
test as per PO / specs
         
As per PO / KSMPL std - Packing   Pickling / Passivation - Visual
         
As per PO instructions - Dispatch   Marking - As per specs & PO
           
        Packing - As per PO / KSMPL std
           
        Dispatch - As per PO instructions
 
 
Manufacturing Process of Carbon Steel - Straight & "U" bending
   
   
Process   Quality Assurance Parameters
     
Raw Material Selection - 100% PMI, 10%ECT, Spectro / Physical / Micro as per specification
   
Coating - Visual
   
Soaping (Stearic Acid) - Visual
   
Pointing - Visual
   
Cold Drawing / Pilgering - Dimensions (OD/Thk/Length), Visual for Die / Plug markings, scoring, pitting etc
   
Heat Treatment - Physical, Mechenical & Metallurgical Properties as per PO / Applicable Specifications
   
Straightening - Visual / Straightness across the length
   
Cutting - Straight length Cutting / Leg length
   
Deburing - Visual
   
Acid Pickling Passivation - Visual
Quality Control Parameters   Straight Length Process   "U" Bend Process   Quality Control Parameters
             
Water leak pressure test
as per PO / specs
- Hydro   NDT
before U Bending
- To detect surface imperfections, scratches and minute defects in acc to applicable code
         
Visual - as per PO /
applicable specs
- Visual Dimension
Inspection
  Stress Reliving - Heating & Soaking temperature, Hardness & Ovality check
           
To detect surface imperfections, scratches and minute defects in acc to applicable code - NDT
(Eddy current / Ultrasonic)
  D P - Surface defects & imperfections
         
As per specs & PO - Marking   Hydro - Water leak pressure
test as per PO / specs
         
As per PO / KSMPL std - Packing   Pickling / Passivation - Visual
         
As per PO instructions - Dispatch   Marking - As per specs & PO
           
        Packing - As per PO / KSMPL std
           
        Dispatch - As per PO instructions
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Standards & Specifications

PIPE SELECTION GUIDE AS PER ANSI 836.19 STANDARD
Nominal Bore Pipe SIze In Schedule 5S Schedule 10S Schedule 40S Schedule 80S
N.B
in inch.
N.B
in mm
mm Wall Thickness in mm Weight kg/mtr. Wall Thickness in mm Weight kg/mtr. Wall Thidmess in mm Weight kg/mtr. Wall Thickness in mm Weight kg/mtr.
1/4" 8 13.72 1.24 0.380 1.65 0.499 2.24 0.644 3.02 0.809
3/8" 10 17.15 1.40 0.544 1.65 0.640 2.31 0.858 3.20 1.118
1/2" 15 21.30 1.65 0.815 2.11 1.016 2.77 1.288 3.73 1.645
3/4" 20 26.70 1.65 1.034 2.11 1.298 2.87 1.710 3.91 2.228
1" 25 33.40 1.65 1.312 2.77 2.125 3.38 2.541 4.55 3.287
1 1/4" 32 42.20 1.65 1.674 2.77 2.732 3.56 3.441 4.85 4.531
1 1/2" 40 48.30 1.65 1.926 2.77 3.155 3.68 4.108 5.08 5.493
2" 50 60.30 1.65 2.424 2.77 3.992 3.91 5.524 5.54 7.601
2 1/2" 65 73.00 2.11 3.747 3.05 5.345 5.16 8.769 7.01 11.589
3" 80 88.90 2.11 4.585 3.05 6.557 5.49 11.466 7.62 15.509
3 1/2" 90 101.60 2.11 5.260 3.05 7.526 5.74 13.778 8.08 18.921
4" 100 114.30 2.11 5.930 3.05 8.496 6.02 16.322 8.56 22.685
5" 125 141.30 2.77 9.610 3.40 11.740 6.55 22.101 9.52 31.444
6" 150 168.30 2.77 11.480 3.40 14.037 7.11 28.694 10.97 43.211
8" 200 219.08 2.77 15.000 3.76 20.290 8.18 43.230 12.70 65.670
10" 250 273.50 3.40 22.950 4.19 28.200 9.27 61.220 12.70 82.780
12" 300 232.90 3.96 31.710 4.57 36.530 9.53 74.990 12.70 98.920
            TABLE OF GAUGES                
Guage No 8 10 12 14 16 18 19 20 22
            S.W.G (Standard Wire Guage)                
Inch 0.160 0.128 0.104 0.080 0.064 0.048 0.040 0.036 0.028
mm 4.064 3.251 2.642 2.032 1.626 1.219 1.016 0.914 0.711
            B.W.G (Birmingham Wire Guage)                
Inch 0.134 0.109 0.083 0.065 0.049 0.042 0.035 0.028 0.028
mm 4.191 3.404 2.769 1.108 1.651 1.245 1.067 0.889 0.711
            HYDROSTATIC TEST                
The Test Pressure shall be determined by the following equation
p = 2 St
          D
where P= Hydrostatic Test pressure in psi
S= allowable fiber stress (60 percent of the specified minimum yield strength for carbon and ferritic alloy steel and 50 percent of the specified minimum Yield strength for austentic alloy steel) in psi.
t=specified wall thickness in inches/mm
D= specified or calculated outside diameter in lnches/mm
The maximum hydrostatic test pressure shall not exceed 2,500 psi for nominal sizes 3 inches & under or 2,800 psi for nominal sizes over 3 inches.
 
 
HIGHLIGHTS OF ASTM SPECIFICATIONS FOR STAINLESS STEEL TUBES AND PIPES
Specifications Allowable Outside Diameter Variations
in mm
Allowable Wall
Variations in %
Exact length Tolerances in mm Testing
ASTM A-213
Seamless Ferritic &
Austenitic steel,
Boiler & Superheater Tubes & Austenitic
steel Heat
Exchange Tubes
Diameter
Over
Under
Over
Under
Over
Under
• Tension Test
• Flattening Test
• Flare Test
• Hardness Test
• 100% Hydrostaticor Eddycurrent or Ultrasonic Test
Under 25.4
25.4-38.1 incl.
38.1-50.8 excl.
50.8-63.5 encl.
63.5-76.2 excl.
76.2-101.6 incl.
0.1016
0.1524
0.2032
0.2540
0.3048
0.3810
0.1016
0.1524
0.2032
0.2540
0.3048
0.3810
20
20
22
22
22
22
0
0
0
0
0
0
3.175
3.175
3.175
3.760
4.760
4.760
0
0
0
0
0
0
ASTM A-269
Seamless & Welded
austenitic steel
tubing for general service
Under 12.7
12.7-38.1 excl.
38.1-88.9 excl.
88.9-139.7 excl.
139.7 203.2 excl.
0.13
0.13
0.25
0.38
0.76
0.13
0.20
0.25
0.28
0.38
15
10
10
10
10
15
10
10
10
10
3.2
3.2
4.8
4.8
4.8
0
0
0
0
0
• Flare Test (Seamless only)
• Hardness Test
• 100% Hydrostatic or Eddycurrent or Ultrasonic Test
ASTM A-270
Seamless & Welded
austenitic steel for
Sanitary Tubing
Under 25.4
25.4 to 50.8 excl.
50.8 to 76.2 excl.
76.2 to 101.6 excl.
0.13
0.20
0.25
0.38
0.13
0.20
0.25
0.38
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
3.2
3.2
3.2
3.2
0
0
0
0
• Reverse Flattening Test
• 100% Hydrostatic or Eddycurrent or Ultrasonic Test
• External polish on all tubes
ASTM A-312
Seamless, Welded
& Heavily Cold worked Austenitic SS Pipes
1/8 to 21/2 incl.,
a II t/D ratios
3 to 18 incl.,
t/D up to 5 % incl.
3 to 18 incl.,
t/D> 5 %
0.40
0.80
1.60
0.80
0.80
0.80
20.0
22.5
15.0
12.5
12.5
12.5
6.35
6.35
6.35
0
0
0
• Tension Test
• Flattening Test
• 100% Hydrostatic or Eddycurrent or Ultrasonic Test

ASME SA 789
Seamless & Welded
Duplex & Super
Duplex Steel

Up to 1/2 (12.7)
Excl 1/2 to 1 1/2
(12.7 to 38.1) excl
1 1/2 to 3 1/2
(38.1 to 88.9) excl
0.005

0.005
0.005
0.13

0.13
0.25
15.0

15.0
15.0
15.0

15.0
15.0
3.175

3.175
4.763
0

0
0
• Tension Test
• Flare Test
• Hardness Test
• 100% Hydrostatic or Eddycurrent or Ultrasonic Test
Equivalent EN Specifications
EN 10216 - 5 Seamless Stainless Steel Tubes for Pressure Purpose
EN 10297 - 2 Seamless Stainless Steel for Mechanical & general Engineering Purpose
EN 10246 - 2 Non- Destructive Testing of Steel Tubes
EN ISO 1127 Dimensions & Tolerances of Stainless Steel Tubes
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Major Customers / Project Executions

Few Customers Reference

No. Logo Full Form
1 Oman Refineries and Petrochemicals Co. LLC
2 Mangalore Refinery & Petrochemicals Ltd.
3 Godrej Group
4 Brahmaputra Crackers & Polymers Ltd.
5 Bharat Heavy Plate & vessels Ltd
6 Aasaam Petrochemical Limited
7 Larsen & Turbo
8 Ganson Petrochemical Limited
9 Reliance Industries Ltd.
10 Thermax
11 Chennai Petroleum Corporation Ltd.
12 Gujarat Narmada Valley Fertilizers Co. Ltd.
13 Bhabha Atomic Research Centre
14 Gujarat State Fertilizers & Chemicals Ltd.
15 Bharat Heavy Electrical Limited
16 Indian Oil Corporation Limited
17 ISGEC
18 Renishaw
19 Essar

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