California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 14 - Petroleum Safety Orders-Drilling and Production › Article 42 - Catheads for Well-Drilling and Well-Servicing Machinery › Section 6642 - Catheads

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) All catheads
					 and their mechanisms shall be designed, constructed, installed and maintained
					 to conform to good engineering practices.
(b) When a cathead is mounted on a shaft end
					 that projects outside the guards for other moving parts of machinery, the shaft
					 end, or the key or other device for securing the cathead to the shaft, shall
					 not project more than one-half the diameter of the shaft beyond a point flush
					 with the outer end of the cathead.
(c) The projecting shaft end and key or other
					 device for securing a cathead to the shaft, as allowed in subsection (b) above,
					 shall be covered with a smooth thimble. The thimble shall be of a shape and
					 design that will prevent the winding of a rope around it.
(d) Every cathead on which a rope is manually
					 operated shall have a reasonably smooth surface and shall be free of
					 projections on which employees' clothing may be caught. Cracked or broken
					 catheads shall not be used.
(e) The
					 horizontal friction surface of every cathead on which a rope is manually
					 operated shall be of uniform diameter between the inner and outer flange. The
					 maximum depth of grooves in the cathead shall not exceed one-fourth
					 inch.
(f) Every cathead on which a
					 rope is manually operated shall be equipped with an anti rope-fouling device
					 that will separate the beginning of the second wrap of rope from the first wrap
					 at the point where the first wrap begins contact with the cathead. The device
					 shall be so designed and fitted in place that its inner edge is not more than
					 three-eighths inch (3/8") at any point from the friction surface of the
					 cathead.
(g) Every cathead on which
					 a rope is manually operated shall have a rope guide that will hold the
					 on-running breaking rope, spinning rope, snapping-up rope, and kelly pull-back
					 rope in alignment with their normal running position against the inner flange
					 of the cathead. This shall also apply to ropes, other than the cat line and
					 high line, used on the cathead for loading and unloading or otherwise handling
					 supplies and equipment.
(h) Anti
					 rope-fouling devices and rope guides shall be maintained free of sharp edges
					 that will cut or materially abrade the ropes in use on the cathead.
(i) Only trained employees shall be permitted
					 to operate the cathead.
(j) A kill
					 switch shall be located at each cathead. The kill switch shall be painted red
					 or otherwise made conspicuous.
(k)
					 Each cathead using chain shall be of the automatic type and shall be equipped
					 with a manually operated cathead clutch or with another device to keep the
					 rotation of the cathead under control when it is in use. Such clutch or device
					 shall be of the "non-grab" type and shall release automatically when not
					 manually held in the engaged position.
1.
						Amendment filed 7-20-59; effective thirtieth day thereafter (Register 59, No.
						12).
2. Amendment of section and NOTE filed 5-8-95; operative 6-7-95
						(Register 95, No. 19).
Note: Authority cited: Section
						  142.3, Labor
						  Code. Reference: Section
						  142.3, Labor
						  Code.