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ASTM A179 Heat Exchanger tube

Seamless cold drawn low carbon steel heat exchanger and condenser tubes.

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ASTM-A179 Standard Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes

ASTM A 179 covers minimum-wall thickness, seamless cold-drawn low-carbon steel tubes for tubular, heat exchanger, condensers, and other heat transfer services. seamless ASTM A 179 steel pipe is supplied and produced by cold drawning.

Chemical composition contains carbon, manganese, phosphorus, and sulfur. Test required: hardness test, flattening test, flaring test, flange test, and hydrostatic test.

Chemistry Composition:

C, %	Mn, %	P, %	S, %
0.06-0.18	0.27-0.63	0.035 max	0.035 max

Mechanical Properties:

Tensile Strength, MPa	Yield Strength, MPa	Elongation, %	Hardness, HRB
325 min	180 min	35 min	72 max

Outside Diameter & Tolerance

Outside Diameter, mm	Tolerance, mm
3.2≤OD＜25.4	±0.10
25.4≤OD≤38.1	±0.15
38.1＜OD＜50.8	±0.20
50.8≤OD＜63.5	±0.25
63.5≤OD＜76.2	±0.30
76.2	±0.38

Wall thickness & Tolerance

Outside Diamter, mm	Tolerance, %
3.2≤OD＜38.1	+20/-0
38.1≤OD≤76.2	+22/-0

U-Bend Fabrication Tolerances:

Item	Condition (when)	Tolercance
	Nominal bend radius ≤ 2 x nominal OD	less than or equal to 12%
Ovality	2 x nominal OD < Nominal bend radius ≤ 4 x nominal OD	less than or equal to 10%
	Nominal bend radius > 4 x nominal OD	less than or equal to 5%
	Nominal bend radius ≤ 2 x nominal OD	0.75 x nominal wall
Mimimum wall thickness	2 x nominal OD < Nominal bend radius ≤ 4 x nominal OD	0.8 x nominal wall
	Nominal bend radius > 4 x nominal OD	0.9 x nominal wall
	Nominal bend radius ≤ 8" (200mm)	+/-3/64"(1mm)
Bending Radius	8" (200mm) < Nominal bend radius ≤ 16" (400mm)	+/-1/16"(1mm)
	Nominal bend radius >16" (400mm)	+/-5/64"(1mm)
Disrance between legs		Max 1/16"(1.5mm)
Wall thinning of bending area		Max 17%
Difference between leg lengths at the ends	Leg length ≤ 16' (4.88m)	+1/8"(3mm)
Difference between leg lengths at the ends	Leg length > 16' (4.88m)	+3/16"(5mm)
Deviation from plane of bend		≤ 3/16"(1.5mm)
Flattening on bend		≤ 10% nominal diameter
Straight leg length	≤5m	+1/8"(3mm)
Straight leg length	>5m	+3/16(5mm)
Total tube length including radius	≤6m	+3/16(5mm)
Total tube length including radius	>6m	+5/16"(8mm)