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ERW Boiler & Air Heater Tubes

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Chemical Composition & Mechanical Properties

Specification Type Grade Chemical Composition% Mechanical Properties Remarks Impect /Hardness
Yield Strength Tensile Strength % Elongation
e
Min. Max. Min. Max..
C Mn. P S SI
Min. Max. Min. Max. Min. Max. Min. Max. PSI MPa PSI MPa PSI MPa PSI MPa
IS: 2416 Pt-IV ERW 310 0.08 0.25 0.35 1.4 0.05 0.05 0.35 - 152 - - - 304 - 402 (100-RM / 9.81) /C, C=2.20 , RM=Measured T.S
360 0.08 0.25 0.35 1.4 0.05 0.05 0.35 - 177 - - - 353 - 451
440 0.08 0.25 0.35 1.4 0.05 0.05 - 0.35 - 201 - - - 402 - 500
IS :11714 Pt-III ERW - 0.06 0.18 0.27 0.63 0.048 0.058 - - - - - - - - - - - 72 HRB(Max.)
IS : 1914 Pt-IV ERW 320 0.08 0.25 0.35 1.4 0.05 0.05 - 0.35 - 176 - - - 320 - 480 (100-RM / 9.81) /C, C=2.20 , RM=Measured T.S -
360 0.08 0.25 0.35 1.4 0.05 0.05 - 0.35 - 198 - - - 360 - 500 -
440 0.08 0.25 0.35 1.4 0.05 0.05 - 0.35 - 242 - - - 440 - 580 -
BS:3059 Pt-I ERW 320 - 0.16 0.30 0.70 0.040 0.040 - 0.35 - 195 - - - 320 - 480 25 -
BS:3059 Pt-II ERW 360 - 0.17 0.4 0.8 0.035 0.035 0.1 0.35 - 235 - - - 360 - 500 24 -
440 0.12 0.18 0.9 1.2 0.035 0.035 0.1 0.35 - 245 - - - 480 - 580 21 -
BS:6323
Pt-V		 ERW ERW-1 - 0.13 - 0.6 0.05 0.05 - - - 200 - - - 300 - - D/a< 20
10
8
7 		D/a >20
20
15
12 		-
ERW-2 - 0.16 - 0.7 0.05 0.05 - - - 250 - - - 340 - - -
ERW-3 - 0.2 - 0.9 0.05 0.05 - 0.35 - 300 - - - 400 - - -
-
ASTM-
A-178 		ERW A 0.06 0.18 0.27 0.63 0.035 0.035 - - 26,000 180 - - 47,000 325 - - 35 -
C - 0.35 - 0.8 0.035 0.035 - - 37,000 255 - - 60,000 415 - - 30 -
ASTM-
A-214 		ERW - - 0.18 0.27 0.63 0.035 0.035 - - - - - - - - - -   72 HRB(Max.)
ASTM
A333 & A334		 ERW 1 - 0.30 0.40 1.06 0.025 0.025 - - 30,000 205 - - 55,000 380 - - 35 18 J ,
85 HRB (Max.)
6 - 0.30 0.29 1.06 0.025 0.025 0.10 - 35,000 240 - - 60,000 415 - - 30 18 J ,
90 HRB (Max.)

Tolerance on Outside Diameter/Dimensions/Wall Thickness, Weight & Length of Pipe

Spec Outside Dia. Wall Thikness Weight Length
Pipe Body Pipe End Nominal Avg.(mm) Minimum Maximum
ft mtr ft mtr ft mtr ft mtr
IS : 1914 Pt-IV +0,-1% N.A. +10%,-5% N.A. Tolrence - Upto 9mtr. +3, -0mm
Above 9mtr. +6,-0mm
IS: 2416 Pt-IV ±0.75%(±0.30 mm min.) N.A. +10%,-5% N.A. Tolrence - Upto 9mtr. +3, -0mm
Above 9mtr. +6,-0mm
IS :11714 Pt-III As per Table N.A. +18%,-0 +10%,-0 Tolerance - Below 50 mm OD +3.2,-0mm
50mm OD & Above +4.8, -0mm
BS:3059 Pt-I ±0.75%(±0.30 mm min.) N.A. Upto3.25mm±10%
Over 3.25mm ±7.5%		 N.A. Tolerance - Upto 6mtr. +6, -0 mm
Above 6mtr 1.5mm will increase for every 3 mtr increase of length.(12mm max.)
BS:3059 Pt-II ±0.75%(±0.30 mm min.) N.A. ±10%(excluding weld area) N.A.
BS:6323 Pt-V As per Table N.A. Less Than 3mm +10% 3mm & Above +8% N.A. - - - - - 3 - 12
Tolerance - Upto 0.5 mtr.+2,-0mm
0.5 to 2mtr. +3,-0mm ; 2 to 5mtr, +5,-0mm;
5 to 7 mtr. +10, -0mm ; Above 7mtr.as agreed
ASTM- A178 &A214 ±0.15to ±0.38mm N.A. +18%,-0 +10%,-0 Tolerance- Under 50.8mm OD +3,-0mm
50.8 & above +5, -0mm
ASTM- A333 & A334 ±0.15 to ±0.38mm N.A. +18%,-0 +10%,-0 20 6 - - 16 4.88 22 671
40 12 35 10.67 22 6.71 - -