IEC 62841-3-12-2021 pdf download.Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery – Safety – Part 3-12: Particular requirements for transportable threading machines.
This clause of Part 1 is applicable, except as follows:
Addition:
This part of IEC 62841 applies to transportable threading machines.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
IEC 60947-5-1 , Low-voltage switchgear and controlgear – Part 5-1: Control circuit devices and switching elements – Electromechanical control circuit devices ISO 7-1 :1 994, Pipe threads where pressure-tight joints are made on the threads – Part 1: Dimensions, tolerances and designation
ANSI/ASME B1 .20.2M:2006, Pipe threads, 60 deg., general purpose
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
Addition:
3.1 01 threading machine
tool that is capable of creating an external thread by either rotating the workpiece or the cutting head, by a mechanical process such as cutting or forming
Note 1 to entry: See Figure 1 01 .
3.1 02 ISO style thread
thread according to ISO 7-1 :1 994: 55 degree pressure-tight taper pipe threads (R) Note 1 to entry: ISO type R threads are also known as BSPT style threads.
3.1 03 NPT style thread
thread according to National Pipe Taper: 60 degree pressure-tight taper pipe threads (NPT) per ANSI/ASME B1 .20.2M:2006
4 General requirements
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable.
6 Radiation, toxicity and similar hazards
This clause of Part 1 is applicable.
7 Classification
This clause of Part 1 is applicable.
8 Marking and instructions
This clause of Part 1 is applicable, except as follows:
8.1 Addition:
– maximum diameter of the thread which can be created. The maximum diameter may be specified in SI units or inches.
NOTE According to the International System of Units, only SI Units are to be used. Nevertheless, some pipe diameters and threads are still specified in inches internationally.
8.1 4.1 Addition: The additional safety instructions as specified in 8.1 4.1 .1 01 shall be given. This part may be printed separately from the “General Power Tool Safety Warnings”.
8.1 4.1 .1 01 Threading machine safety warnings
a) Keep floor dry and free of slippery materials such as oil. Slippery floors invite accidents.
b) Restrict access or barricade the area from bystanders when the workpiece extends beyond the machine to provide a minimum of one metre clearance from the workpiece. Restricting access or barricading the work area around the workpiece will reduce the risk of entanglement.
c) Do not wear gloves. Gloves may be entangled by the rotating pipe or machine parts leading to personal injury.
d) Do not use the machine for other purposes such as drilling holes or turning winches. Other uses or modifying this machine for other applications may increase the risk of serious injury.
e) Secure the machine to a bench or stand. Support long heavy pipe with pipe supports. This practice will prevent the machine from tipping.
f) While operating the machine, stand on the side where the operator control switch is located. Operating the machine from this side eliminates need to reach over the machine.
g) Keep hands away from rotating pipe and fittings. Stop the machine before wiping pipe threads or screwing on fittings. Allow the machine to come to a complete stop before touching the pipe. This practice will reduce the risk of entanglement in rotating parts.IEC 62841-3-12 pdf download.