ASME B30.1-2015 pdf download.Jacks, Industrial Rollers, Air Casters, and Hydraulic Gantries.
1-1.4.2 Proof Load Requirements (a) When proof testing a newly designed mechani- cal jack (1) the jack’s load point shall be loaded to 110% of its lifting rated load and operated to its full length of travel through ten cycles (dynamic test). (2) the jack’s load point shall be loaded three times to 150% of its rated load. The rack bar or screw shall be at least 90% of full travel. After this test, the jack shall be functional for full extension under 100% ofrated load (static test). (3) each auxiliary load point shall be proof tested in accordance with the same cycles and percentages described in paras. 1-1.4.2(a)(1) and (2). (b) The proof load for each newly manufactured mechanical jack shall be a minimum of 100% of the rated load. (c) The proof load for each altered, modified, or repaired mechanical jack shall be a minimum of 100% of the rated load unless otherwise determined by the manufacturer or a qualified person.
1-2.1.2 Design (a) The load-bearing materials in the jack shall have sufficient strength and ductility to raise, lower, and sup- port the rated load at the temperatures at which it will be used. (b) The jack shall be designed to meet the proof load requirements in para. 1-2.4.2(a). (c) The jack should be designed to ensure that the computed stress in the structural components of the jack does not exceed 50% of the yield strength of the material at the appropriate rated load for the components. (d) Control parts and accessory equipment shall be designed to provide a means of operation and adjust- ment that will minimize exposure of the operator to injury. (e) Carrying handles, if provided, shall be capable of statically supporting 200% of the weight of the jack. (f) Each double-acting hydraulic jack shall be fitted with a relief valve on the retract circuit, which allows hydraulic fluid to flow from the smaller effective area of the jack. A flow-restricting component shall not be present between the relief valve and the smaller area. (g) Changes in physical properties caused by welding handles, eyes, or other approved attachments to a hydraulic jack shall be taken into account.
1-2.4.2 Proof Load Requirements (a) When proof loading a newly designed hydraulic jack (1) the jack’s load point shall be loaded to 110% of its lifting rated load and operated to its full length of travel through ten cycles (dynamic test). (2) the jack or cylinder’s load point shall be loaded 3 times to 150% of its rated load. The ram(s) and screw extension shall be extended to at least 90% of full travel. After this test, the jack shall be functional for full exten- sion under 100% of rated load (static test) and be free of leaks. (3) each auxiliary load point shall be proof tested in accordance with the same cycles and percentages described in paras. 1-2.4.2(a)(1) and (2). (b) The proof load for each newly manufactured hydraulic jack shall be a minimum of 100% of the rated load. (c) The proof load for each altered, modified, or repaired hydraulic jack shall be a minimum of 100% of the rated load unless otherwise determined by the manufacturer or a qualified person.ASME B30.1 pdf download.