ASME B30.27 pdf download.Material Placement Systems.
Volume B30.27, Material Placement Systems, includes provisions that apply to the construction, installation, operation, inspection, testing, and maintenance of trailer and truck-mounted material placement systems. Included in this are mechanical and hydraulic pea gravel systems, mobile telescoping boom conveyors. separate placing booms, and material placement accessories (see Figures 27-0.1-1 through 27-0.1-8). Truck-mounted material placement systems can be either with or without an integral placing boom.
This Volume does not apply to the conveyor parts of mobile telescoping boom conveyors. mortar conveying and spraying machines, or dry mix shotcreting machines. The conveyor section of these machines Is covered by
ASME 820.1.
19i SECTION 27-0.2: DEFINITIONS
concrete delivery hose: a flexible delivery hose having a coupling on each end.
control panel: controls mounted on the equipment.
delivery systems: delivery lines, pipes, hoses, attachment components. and transfer valves, through which material is transported (see Figure 27.0.1-8).
durably marked: a method of attaching information to a part, assembly, or machine that will satisfy the need for the marking, e.g.. in the case of pipe or hose components, a marking that would last until the component Is installed on a machine or put into use would be considered durably marked. For all other items required to be durably marked, the marking would last for the expected life of the part or machine under reasonably foreseeable circumstances.
end hose: a flexible concrete delivery hose that only has one coupling.
field make-up pipe: a delivery pipe section constructed for a specific job site to the exact length required.
fixed guard: a component used to shield the user from machine interaction and attached by mechanical means. On material placement systems, temporary or removable guards do exist, such as a hopper grate that rotates up for cleaning but is covered by a separate safety switch.
(d) proper positioning of outriggers in all intended operational positions
(e) proper setting of hydraulic pressures and relief settings
(f) no unusual vibrations or noise
(g) the boom will support the intended load without seeping down in excess of the manufacturers specification
(h) proper operation and engaging of latching and locking devices
(I) compliance with the requirements of this Volume
27-22.2 Manufacturer’s StabiLity Test
A representative unit of each model and chassis in each intended operation configuration shall be tested for stability. A written test report shall be kept on file. The stability test shall comply with the following minimum guidelines:
(a) The margin of stability shall be determined by calculation of the static load imposed by the boom and its systems and mountings, plus the maximum allowable load imposed on the boom by the material in the delivery system, including end hose, and the boom rotated to the least stable position. The calculation of the material load shall be based on material with a bulk density of 150 lb/ft’ (2 400 kg/m3).
(b) If having the outriggers, extendable axles, or other means in use are part of the normal configuration to meet the stability requirements, they shall be set per manufacturer’s instructions.
(c) The test load equivalent to 125% of the rated load (1.25 times) shall be applied to the boom to verif’ its stability. The manufacturer shall determine the most critical configuration(s) of the unit for this test. Ballast may be applied to the unit that is equivalent to the weight of mate. rial in the hopper (filled to the top of delivery cylinder opening), one delivery cylinder (filled 75%), and the deck delivery line.
(d) None of the stability testing shall cause permanent deformation to any component. While being tested, three outriggers shall remain in contact with the support surface. During the stability test, the lifting of one outrigger on the opposite side of the load does not necessarily indicate a condition of instability.
27-2.2.3 Postmalntenance Test
Before being returned to service after maintenance is performed, any altered, replaced, or repaired components shall be tested for proper operation per the manufacturer’s recommendations.
ASME B30.27 pdf download
