Schwing SPB 28, Operation Manual

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69
Operation
SPB Operation Manual
Hanging extra system from the boom
Concrete weighs about 150 pounds per cubic foot, so
the total weight of the supplied tip hose and the con-
crete inside is 376 pounds. The total weight allowed to
be hung from the boom is 376 pounds.
Boom cracking hazard. Do not hang
more than 550 pounds from the end
of the boom.
If you will be removing the supplied tip hose and replac-
ing it with a combination of reducers and hoses, you
must pay close attention to the overall weight that the
boom will lift. The entire assembly that you attach must
not exceed 376 pounds, including the weight of the con-
crete. Exceeding this weight limit will cause the metal in
the boom to fatigue and can lead to cracks. All pieces
that hang from the boom must be in like-new condition
and must be securely clamped and pinned. Safety ca-
bles or whipchecks must be used on each piece. (Fig-
ure 37) shows an example of acceptable reducer/hose
combinations.
Weight of pipe = 5 pounds
Weight of concrete in the pipe = 5 pounds
Heavy Duty 5" clamp.
Weight of clamp = 14 pounds
5" to 4" reducer, 36" long. HD ends.
Weight of reducer = 43 pounds
Weight of concrete in reducer = 50 pounds
Heavy Duty 4" clamp.
Weight of clamp = 11 pounds
Total of all weights = 361 pounds
Adapter pipe from metric 148 mm
to Heavy Duty raised ends.
12 foot long, 4" concrete delivery hose,
coupled one end. 4 ply steel reinforced.
Heavy Duty raised end.
Weight of hose = 77 pounds
Weight of concrete in the hose = 156 pounds
Figure 37
Examplesof adapter/reducer/hose combinations
Never use grooved or victaulic pipe
or hose ends for pumping concrete.
Victaulic system is not capable of
withstanding the pressure applied by
a concrete pump.
It is not possible to safely connect hoses or pipes that
have dissimilar ends. The hose supplied by Schwing
has 125 millimeter metric ends. If you are trying to at-
tach it to any of the other end types (heavy duty or male/
female high pressure), you must use an adapter pipe
that has one of each coupling type (metric or the other)
on either end. This adapter pipe would have weight, of
course, and the weight will have to be accounted for
if you are hanging reducers and smaller hoses. The
adapter pipe must also be secured by a safety cable,
and all clamps must be pinned.
If you must use more pipe or hose than is allowed be-
cause of the weight restrictions, have a crane or oth-
er lifting device hold the weight of the system for the
boom. Secure the system in such a manner that the
placing boom will not carry the load, and do not allow
workers under the system.
If you will be pumping out of the boom into a slickline,
never attach the boom elbow directly to the slickline.
Use the tip hose between the boom elbow and the slick-
line. This will allow for movement of both the boom and
the slickline. Do not let the tip hose kink, as kinks cre-
ate blockages. Blockages can cause accidents. See the
warnings about blockages in the Safety Manual.