Schwing SPB 28, Operation Manual

Page: 105 / 216

APPEN D IX
700Apndx.fm
PAGE 75
S AF ETY M AN U AL
V III . M ini mum Pip e Wa ll Th i ck n e ss C h art
PIPE WALL THICKNESS
0
.025"
.050"
.075"
.100"
.125"
.150"
.175"
.200"
.225"
.250"
.275"
.300"
.325"
.350"
.375"
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
SCHEDULE 40
(1/4 wall)
9 gauge 3/16” 11 gauge 7 gauge
MA
TERIAL
PRESSURE
BAR PSI
1. This chart assumes a safety factor of 2:1. Higher safety factors may be required in some circumstances.
2. Wear reduces wall thickness. Thickness must be checked on a regular basis.
3. Pressures may be limited even more by clamp style or pipe end used.
4. The chart is based on 62,000 PSI tensile strength. Heat-treated calculations are based on 120,000 PSI tensile strength.
5. The chart is for pressure calculations ONLY. There is no allowance for mechanical forces other than pressure, and thicker
walls may be needed for mechanical strength because of support or restraint considerations.
6. The chart does not take into account metal fatigue caused by pressure cycles.
Note! This chart is intended as a guide for concrete pumping applications and is subject to the notes,
assumptions, and conditions listed above. Any other use of this chart is not recommended.
This chart does not apply to double-wall pipe. Double-wall pipe can be checked by inspecting the inside of the pipe. If the insert is intact, the pipe is
okay. If the insert is worn through, the pipe must be replaced. Contact your pipe supplier for the pressure capacity of your double-wall pipe.
pipewallvsPress2.eps
.heat treated .standard
4“ HEA
T
TREA
TED
5“ HEA
T
TREA
TED
6“ HEA
T
TRE
ATED
4.8”
& 4.9“ HEA
T
TREA
TED
4.4”
HEA
T
TR
EA
TED
4.9“ (7,
9,
11 gauge) syst
em (125 mm)
6“ syst
em
5“ syst
em
4.0“ syst
em
4.4“
syst
em
4.8“ syst
em
0.120” 0.150” 0.177” 0.188” 0.250”