ASME B30.20:2006 pdf free download

ASME B30.20:2006 pdf free download.Below-the-Hook Lifting Devices.
lifter: see below-tire-hook lifting device.
liftinç device: see below-t he-hook lifting device.
normal operating coirdit ions: conditions during which the lifter is performing functions within the scope of the original design.
qualified person: a person who, by possession of a recognized degree in an applicable field or certificate of professional standing, or who, by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and work.
rated load: the maximum load for which the equipment is designated by the manufacturer.
service class: lifter classification that establishes the allowable stress range for the specified fatigue life (load cycles).
shall: indicates that the rule is mandatory and must be followed.
should: indicates that the rule is a recommendation, the advisability of which depends on the facts in each situation.
SECTION 20-0.3: DEFINITIONS FOR CHAPTER 20-1
chain/hand wheel: a device for manually operating a lifter. friction-type pressure-gripping lifters: lifters that grip the load without significant or harmful permanent deformation of the load surface (see Fig. 1).
grip ratio: the ratio of the sum of the horizontal forces on one side of the load to the live weight of the load. For example, if the total horizontal force on one side of the load is 100,000 lb and the live load is 50,000 lb. the grip ratio is 2. For purposes of this calculation, the weight of the load does not include the weight of the lifter (see Fig. 2).
crippinç force: the force the lifting device exerts on the load.
indentation-type pressure-gripping Iffrrs: lifters that carry the load by applying force to indent the sides of the load (see Fig. 3).
20-1.3.5 LIfting Devices Not In Regular Use
A lifter that has been idle for a period of 1 month or more is to be given an inspection in accordance with para. 20-1.3.3 before being placed in service.
20-1.3.6 Inspection Records
Dated inspection reports shall be made on critical items such as those listed in para. 20-1.3,4. Records should be available to appointed personnel for each periodic inspection and when the lifter is either modified or repaired.
20-1.3.7 RepaIrs
Any indications of damage disclosed by the inspection requirements of Section 20-1.3 shall be corrected according to the procedures outlined in para. 20-1.3.9 before operation of the lifter is resumed.
20-1.3.8 Testing
20-1.3.8.1 Operational Tests
(a) New and reinstalled lifting devices shall be tested by a qualified person, or a designated person under the direction of a qualified person, prior to initial use to verify compliance with applicable provisions of this Volume, including, but not limited to, the following:
(1) Moving Parts. Lifters with moving parts shall be tested to determine that the lifter operates in accordance with manufacturer’s instructions.
(2) Latches. Lifters with manually operated or automatic latches shall be tested to determine that the latch operates in accordance with manufacturer’s instructions.
Ui) Altered, repaired, or modified lifters shall be tested by a qualified person, or a designated person under the direction of a qualified person. Thi% test may be limited to the provisions affected by the alteration, repair, or modification, as determined by a qualified person with guidance from the manufacturer.
(c) All indicator lights, gages, horns, bells, alarms, pointers, and other warning devices shall be tested.
(d) Dated reports of all operational tests shall be filed.
6) 20-1.3.8.2 Load Test
(a) Prior to initial use, all ne altered, modified, or repaired lifting devices should be tested and inspected. If performed, tests shall be done under the direction of a qualified person and a written report be furnished by such a person, confirming the load rating of the lifter. The load rating should not be more than 80% of the maximum load sustained during the test. Test loads shall not be more than 125% of the rated load unless otherwise recommended by the manufacturer. Test reports should be available.
(b) The load test, if made, shall consist of the following operations as a minimum requirement.