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SPCIFICATION FOR STANDARD SIZS N 15 : 2 + A1 : 27 FOR BLACK AND HOT DIPPD GALVANIZD STL PIPS Tube T Y P - L T Y P - L1 T Y Size OD (Specified) Wall Thickness (mm) Weight of Tube (Kg./Mtr) Pressure Inch NB Min Max Black S/S Bar 1/2 3/ 1 1 1/ 1 1/2 2 2 1/2 3 3 1/2 5 6 1/2 3/ 1 1 1/ 1 1/2 2 2 1/2 3 1/2 3/ 2 8 9 1 1 1 2 8 1 2 21. 26. 3 1.9 7.8 59.6 75.2 87.9 1.3 113. 138.5 16 21. 26. 3 1.9 7.8 59.6 75.2 87.9 113. 21. 26. 21.7 27.1 3. 2.7 8.6 6.7 76. 88.7 11.2 113.9 1.8 166.5 21.7 27.1 3. 2.7 8.6 6.7 76. 89. 11.9 21. 26.9 2.3 2.3.5.5 2.3 2.3. 2. 2.3 1.8 1. 2.2 2.82 5.51 5.75 6.76 8.7 9.83. 17.8 1.8 1.39 2.2 2.82.9 5.73 7.55 1.8.97 1.38 1.9 1.1 2.22 2.85 9.58 5.87 6.93 8.88 1.1.5 18. 1.9 1. 2.22 2.85 8.56 5.85 7.72 11.1.956 1.39

SPCIFICATION FOR STANDARD SIZS N 15 : 2 + A1 : 27 FOR BLACK AND HOT DIPPD GALVANIZD STL PIPS Tube P - L2 M D I U M H A V Y Size OD (Specified) Wall Thickness (mm) Weight of Tube (Kg./Mtr) Pressure Inch NB Min Max Black S/S Bar 1 1 1/ 1 1/2 2 2 1/2 3 1/2 3/ 1 1 1/ 1 1/2 2 2 1/2 3 5 6 1/2 3/ 1 1 1/ 1 1/2 2 8 1 2 8 1 1 1 2 3 1.9 7.8 59.6 75.2 87.9 113. 21.1 26.5 33.3 2. 7.9 59.7 75.3 88. 113.1 138.5 163.9 21.1 26.5 33.3 2. 7.9 59.7 33.8 2.5 8. 6.2 76. 88.7 113.9 21.8 27.3 3.2 8.8 6.8 76.6 89.5 1. 1.8 166.5 21.8 27.3 3.2 8.8 6.8 2.6 2.6 2.6 2.6..5 5. 5.....5 1.98 2.5 3.8 5.71 6.72 9.75 1.21 1.56 2.1 3.1 3.56 5.3 6.2 8.36 12.2 16.6 19.8 1. 1.87 3 2.79.37 6.19 2. 2.57 7. 5.83 6.89 1. 1.22 1.57 2.3 3.13 5.1 6.5 8.53 12.5 17.1 2. 1.5 1.88 5 3.82.1 6.26

SPCIFICATION FOR STANDARD SIZS N 15 : 2 + A1 : 27 FOR BLACK AND HOT DIPPD GALVANIZD STL PIPS. Tube Size OD (Specified) Wall Thickness (mm) Weight of Tube (Kg./Mtr) Pressure Inch NB Min Max Black S/S Bar 2 1/2 3 5 6 8 1 1 1 75.3 88. 113.1 138.5 163.9 76.6 89.5 1. 1.8 166.5.5 5. 5. 5. 5. 7.93 1.3 1.5 17.9 21.3 8.5 1.5 1.8 18. 21.9 Tolerance : As per the above table 1. Outside Diameter : Straightness shall no exceed.2 L. 2. Staightness 3. Mass : =7.5% on bundles of 1 tons or more, for M and H series and Type L : -1% - 8% on indivisual tubes for Types L1 and L2. : + 1% for M and H series & Types L. Thickness 5. nds 6. Chemical Composition : -8% with the plus tolerance limited by the mass tolerance for Types L1 and L2. : Cut cleanly and nominally square with the axis of the tube and free from excessive burrs. : % Max: C -.2%, Mn - 1.%, S -.3% & P -.35% 7. Mechanical Properties : UTS - to 52 N/mm2, YS - 195 N/mm2 (minimum & %L - 2 (minimum)

SPCIFICATION FOR STANDARD SIZS N 15 : 2 + A1 : 27 FOR BLACK AND HOT DIPPD GALVANIZD STL PIPS. 8. Flattening Test : The flattening test shall be applied to bare tubes with specified outside diameter greater than 6.3mm. Welded tubes shall be flattened with the weld placed alternately at or 9 to the direction of the Flattening force. : For Weld Test - Flatten up to 75% of original tube OD.No cracks in the weld. : For Material other than Weld-Flatten up to 6% of original tube OD. No cracks in the metal other than in the weld. 9. Bend Test : Bend test up to 6.3mm OD. Radius at the bottom of the groove of the former shall be as per below table. The tubes shall show no cracks visible without magnifying aids. Diameter (D) 21.3 26.9 33.7 2. 8.3 6.3 Bending Radius 85 1 1 17 22 1. Leak Tightness Test 11. Zinc Coating 12. Threading 13. Marking a) :On line NDT (ddy Current) b) :Hydro testing at pressure as per above table and holding time min. 5 Second. : As per N 12A1 : For 1/2" to 3/" - 1 TPI and from 1" to 6" - 11 TPI Check with standard ring and plug gauges. : We can do on line stenciling as per this stanadrd & as per customer needs at one meter interval : We can do on line stenciling as per this stanadrd & as per customer needs at one meter interval

SPCIFICATION FOR STANDARD SIZS N 15 : 2 + A1 : 27 FOR BLACK AND HOT DIPPD GALVANIZD STL PIPS. 1. Packing : Hexagonal Type. Color Coading 16. Mill Test Certificate : For Type L - Green For Type L1 - White For Type L2 - Brown For Heavy - Red For Medium - Blue We can issue a MTC, Certifying that the tubes supplied comply with this standard.

SPCIFICIATION FOR STANDARD SIZS XTRACTS FROM ASTM A53 GR-A SCHDUL - FOR BLACK AND GALVANIZD STL PIPS Designation OD (Minimum) OD (Maximum) Wall Thickness Weight Tube (Plain nd) Pressure Gr. A Weight of the (SS) Inch NB(mm) Inch mm 1/2" 3/" 1" 1 1/" 1 1/2" 2" 2 1/2" 3" 3 1/2" " 5" 6" 8" 1" 12" 2 8 9 1 1 1 2 2 3.822 1.35 1.3 1.65 1.885 2.3 2.8 3.6 3.96. 5.7 6.56 8.562 1.669 12.637 26.3 33. 1.8 7.9 59.7 72.3 88. 1.6 11 139.9 166.6 217. 271. 1. Inch mm Inch mm Lb./Ft. Kg./Mtr. PSI Lb./Ft. Kg./Mtr..85 1.7 1.33 1.68 1.92 2. 3.53..5 5.62 6.69 8.7 1.82 6 12. 85 21.7 27.1 33.8 2.6 8.7 6.9 73.7 89.8 12.6 1. 12. 7 169. 9 8 221. 275. 6. 5.19.113.133.1.15..23.216.226.237.8.28.2.3.6 2.77 2.87 3.38 3.56 8 3.91 5.16 5.9 5.7 6.2 6.55 7.11 8.18 9.27 1.31.8 1.13 1.68 2.27 2.72 6 5.8 7.58 9.12 18 1.63 18.99 28.58.52 53.57 1.27 1.69 2. 3.39.5 5. 8.63 11.29 13.57 16.7 21.77 28.26 2.55 6.29 79.7 7 7 7 12 12 23 2 222 23 19 167 2 13 122 11.86 1.1 1.69 2.28 2.7 8 5.8 7.68 9.27 1.92 1.9 19.3 1.27 1.69 2. 3.. 5.6 8.67 11.35 13.71 16.23 22.7 28.58 Pieces Per Bundle 12 8 6 2 36 26 18 1 12 1 7 7 2

SPCIFICIATION FOR STANDARD SIZS XTRACTS FROM ASTM A53 GR-A SCHDUL - FOR BLACK AND GALVANIZD STL PIPS 1. Tollerence a) On Thickness The minimum wall thickness at any point shall be not more than 12.5% under the specified wall thickness. b) On Diameter For NPS 11/2" & under any point shall not vary more than ±. mm. For NPS 2" & above shall not vary more than ± 1% from the standard specified c) Weight The weight of the pipe shall not more than ±1 % of the specified weight. 3. Internal Debeading a) 1 1/2" and below size - b) 2' and over size nd finish shall be at the option of manufacturer which is nominally square cut with the axis of tube and free from excessive Bevelled with ends beveled to an angle of 3, + 5 / - degree measured from a line perpendicular to the axis of the pipe with a root face of 1.6 mm ±.8 mm. 2" and above Internal beads to be removed completely.. Chemical Composition (% Max) C -.%, Mn -.95%, S -.5%, P -.%, Cu -.%, Ni -.%, Cr -.%, Mo -.% & V -.8% (Cu+Ni+Cr+Mo+V=1.% max.) 5. Mechanical (Min) Yield Strength- N/mm2,Tensile Strength-33 N/mm2, longation-2-36% 6. Bend Test a) Applicable to tubes upto and including nominal size of mm When orderd for close coiling bend up to 18 degrees around a cylindrical mandrel,the diameter of which is 8 times the OD of pipe. b) Bend up to 9 degree around a cylindrical mandrel, the diameter is 12 times the OD of pipe. : No Crack at any portion and no open in the weld.

SPCIFICIATION FOR STANDARD SIZS XTRACTS FROM ASTM A53 GR-A SCHDUL - FOR BLACK AND GALVANIZD STL PIPS 8. Flattening Test Applicable to tubes greater than nominal sizes of mm &weld located /9 degree from line of direction of force. Stage -1 Stage -2 Stage -3 For weld ductility until 2/3 of outside dia of specimen tube. For ductility of steel until 1/3 of outside dia of specimen tube. Full flattening for testing of laminated and unsound material. 8. Leak Tightness Test a) b) On line NDT(ddy Current) Hydro testing at pressure as per above Table and holding time Min. 5 second. 11. Black Varnish Tubes are uniformly varnished externally over their full length. 1. Zinc Coating Average 5 Gm/mm2 but one side should not be less than 9 Gm/nnnn2. Free from bare Spot,Black spot,rough,overcoating, Peel off or anyother surface defect. 11. Threading For 1/2" & 3/" - 1 Tpi, 1" To 2" - 11.5 Tpi And 2 1/2" To 6" - 8tpi. Check With Standard Astm Ring And Plug Gauges. 12. Marking We can do on line stenciling as per this stanadrd & as per customer needs at one meter interval 13. Packing Hexagonal Type 1. Mill Test Certificate We can issue a MTC,certifying that the tubes supplied comply with this ASTM A 53 Standard

SPCIFICIATION FOR STANDARD SIZS ASTM A53 GR-B SCHDUL- FOR BLACK AND HOT DIPPD GALVANIZD STL PIPS Designation OD (Minimum) OD (Maximum) Wall Thickness Weight Tube (Plain nd) Pressure Gr. A Gr. A Weight of the (SS) Inch NB(mm) Inch mm 1/2" 3/" 1" 1 1/" 1 1/2" 2" 2 1/2" 3" 3 1/2" " 5" 6" 8" 1" 12" 2 8 9 1 1 1 2 2 3.822 1.35 1.3 1.65 1.885 2.3 2.8 3.6 3.96. 5.7 6.56 8.562 1.669 12.637 26.3 33. 1.8 7.9 59.7 72.3 88. 1.6 11 139.9 166.6 217. 271. 1. Inch mm Inch mm Lb./Ft. Kg./Mtr. PSI Lb./Ft. Kg./Mtr..85 1.7 1.33 1.68 1.92 2. 3.53..5 5.62 6.69 8.7 1.82 6 12.85 21.7 27.1 33.8 2.6 8.7 6.9 73.7 89.8 12.6 1. 12. 7 169. 9 8 221. 275. 6. 5.19.113.133.1.15..23.216.226.237.8.28.2.3.6 2.77 2.87 3.38 3.56 8 3.91 5.16 5.9 5.7 6.2 6.55 7.11 8.18 9.27 1.31.8 1.13 1.68 2.27 2.72 6 5.8 7.58 9.12 1.8 1.63 18.99 28.58.52 53.57 1.27 1.69 2. 3.39.5 5. 8.63 11.29 13.57 16.7 21.77 28.26 2.55 6.29 79.7 7 7 7 13 13 2 2 2 237 221 19 178 7 13 13.86 1.1 1.69 2.28 2.7 8 5.8 7.68 9.27 1.92 1.9 19.3 1.27 1.69 2. 3.. 5.6 8.67 11.35 13.71 16.23 22.7 28.58 Pieces Per Bundle 12 8 6 2 36 26 18 1 12 1 7 7 2

SPCIFICIATION FOR STANDARD SIZS ASTM A53 GR-B SCHDUL- FOR BLACK AND HOT DIPPD GALVANIZD STL PIPS 1. Tollerence a) On Thickness The minimum wall thickness at any point shall be not more than 12.5% under the specified wall thickness. b) On Diameter For NPS 11/2" & under any point shall not vary more than ±. mm. For NPS 2" & above shall not vary more than ± 1% from the standard specified c) On Weight The weight of the pipe shall not more than ±1 % of the specified weight. 2. nds a) 1 1/2" and below size - nd finish shall be at the option of manufacturer which is nominally square cut with the axis of tube and free from excessive burrs. b) 2' and over size Bevelled with ends beveled to an angle of 3, + 5 / - degree measured from a line perpendicular to the axis of the pipe with a root face of 1.6 mm ±.8 mm. 3. Internal Debeading 2" and above Internal beads to be removed completely.. Heat Tretmetifs Weld Seam of the RW Pipe in Grade B shall be heat treated after welding to a minimum tempreture of 5 C, so that no untempred martensite remains 5, Chemical Composition (% Max) C -.3%, Mn - 1.2%, S -.5%, P -.%, Cu -.%, Ni -.%, Cr -.%, Mo -.% & V -.8% (Cu+Ni+Cr+Mo+V=1.% max.) 6. Mechanical (Min) Yield Strength-2 N/mm2,Tensile Strength- N/mm2,longation-19-3% 7. Bend Test a) Applicable to tubes upto and including nominal size of mm When orderd for close coiling bend up to 18 degrees around a cylindrical mandrel,the diameter of which is 8 times the OD of pipe.

SPCIFICIATION FOR STANDARD SIZS ASTM A53 GR-B SCHDUL- FOR BLACK AND HOT DIPPD GALVANIZD STL PIPS b) Bend up to 9 degree around a cylindrical mandrel, the diameter is 12 times the OD of pipe. No Crack at any portion and no open in the weld. 8. Flattening Test Applicable to tubes greater than nominal sizes of mm & weld located /9 degree from line of direction of force. Stage -1 Stage -2 Stage -3 For weld ductility until 2/3 of outside dia of specimen tube. For ductility of steel until 1/3 of outside dia of specimen tube. Full flattening for testing of laminated and unsound material. 9. Leak Tightness Test a) b) On line NDT(ddy Current) Hydro testing at pressure as per above Table and holding time Min. 5 second. 1. Black Varnish Tubes are uniformly varnished externally over their full length. 11. Zinc Coating Average 5 Gm/mm2 but one side should not be less than 9 Gm/nnnn2. Free from bare Spot,Black spot,rough,overcoating, Peel off or anyother surface defect. 12. Threading For 1/2" & 3/" - 1 Tpi, 1" To 2" - 11.5 Tpi And 2 1/2" To 6" - 8tpi. Check With Standard Astm Ring And Plug Gauges. 13. Marking : We can do on line stenciling as per this stanadrd & as per customer needs at one meter interval 1. Packing Hexagonal Type. Mill Test Certificate We can issue a MTC,certifying that the tubes supplied comply with this ASTM A 53 Standard