Tuesday 10 September 2019

Ingress Protection Rating

PROTECTION MARKING
Many products undergo a variety of tests before they reach the market. These tests include product safety testing, electromagnetic compatibility, vibration testing and many others.
Products used indoors or outdoors are often tested against “ingress,” that is, the product’s resistance to water, dust and foreign objects. There are several reasons for ingress testing, including safety, functionality and product marketing.
Many products require insulation from outside elements in order to function properly. Those outside elements include mist, steam, sprayed water, sand, oil and even fingers, just to name a few. Ingress protection testing helps determine whether a particular product is going to function appropriately when placed in the field.
Different products require different levels of testing and different types of testing. Generally, ingress protection is divided into testing for ingress from foreign objects or liquids. With many products, the point where it would be most likely to fail comes at a seam between two parts.
The higher the protection degree, the more watertight the casing will be. However, when installing an enclosure outdoors, exposure to weather conditions can cause temperature variations.



What is an IP rating?
IP (or "Ingress Protection") ratings are defined in international standard EN 60529 (British BS EN 60529:1992, European IEC 60509:1989). They are used to define levels of sealing effectiveness of electrical enclosures against intrusion from foreign bodies (tools, dirt etc) and moisture.
What do the numbers in an IP Rating mean?
The numbers that follow IP each have a specific meaning. The first indicates the degree of protection (of people) from moving parts, as well as the protection of enclosed equipment from foreign bodies. The second defines the protection level that the enclosure enjoys from various forms of moisture (drips, sprays, submersion etc). The tables below should help make sense of it:
IP Ratings - what they mean.

IP Rated Enclosures - quick find chart
A number replaced by x indicates that the enclosure is not rated for that spec.
First Digit (Intrusion Protection)
       0.   (or X - see section below): No special protection. Not rated (or no rating             supplied) for protection against ingress of this type.
  1. Protection from a large part of the body such as a hand (but no protection from deliberate access); from solid objects greater than 50mm in diameter.
  2. Protection against fingers or other object not greater than 80mm in length and 12mm in diameter (accidental finger contact).
  3. Protection from entry by tools, wires etc, with a diameter of 2.5 mm or more.
  4. Protection against solid objects larger than 1mm (wires, nails, screws, larger insects and other potentially invasive small objects such as tools/small etc).
  5. Partial protection against dust that may harm equipment.
  6. Totally dust tight. Full protection against dust and other particulates, including a vacuum seal, tested against continuous airflow.
Second Digit (Moisture Protection)
        0.   (Or X - see section below): No protection.
  1. Protection against vertically falling droplets, such as condensation. Ensuring that no damage or interrupted functioning of components will be incurred when an item is upright.
  2. Protection against water droplets deflected up to 15° from vertical
  3. Protected against spray up to 60° from vertical.
  4. Protected against water splashes from all directions. Tested for a minimum of 10 minutes with an oscillating spray (limited ingress permitted with no harmful effects).
  5. Protection against low-pressure jets (6.3 mm) of directed water from any angle (limited ingress permitted with no harmful effects).
  6. Protection against direct high pressure jets.
  7. Protection against full immersion for up to 30 minutes at depths between 15 cm and 1 metre (limited ingress permitted with no harmful effects).
  8. Protection against extended immersion under higher pressure (i.e. greater depths). Precise parameters of this test will be set and advertised by the manufacturer and may include additional factors such as temperature fluctuations and flow rates, depending on equipment type.
  9. (K): Protection against high-pressure, high-temperature jet sprays, wash-downs or steam-cleaning procedures - this rating is most often seen in specific road vehicle applications (standard ISO 20653:2013 Road Vehicles - Degrees of protection).
IPX Ratings
Not an entirely valid IP rating, but still occasionally seen on websites offering enclosures (but more commonly lighting). The "x" simply denotes that the value for that number is missing. You can replace it with a zero, assuming that it has not ingress protection rating. This may not be the case, but better safe than sorry. The first number denotes foreign body ingress protection, the second moisture. So "x"5 for example, means that there is no defined protection from solid objects, but protection against low pressure water jets, while 5"x" would denote partial protection from dust, but no particular protection from moisture.


Our range
While we cover a huge range of electrical enclosures, our most common IP ratings are probably 65, 66, 67 and 68. So for quick reference, these are defined below:
  • IP65 Enclosure - IP rated as "dust tight" and protected against water projected from a nozzle.
  • IP66 Enclosure - IP rated as "dust tight" and protected against heavy seas or powerful jets of water.
  • IP 67 Enclosures - IP rated as "dust tight" and protected against immersion. for 30 minutes at depths 150mm - 1000mm
  • IP 68 Enclosures - IP rated as "dust tight" and protected against complete, continuous submersion in water.



Collected by 
Doshti
Indian Safety Association











Source: National Technical Systems, DSM&T Company & Enclosure Company

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Thursday 5 September 2019

Best Practice to Pipe Marking

Pipe Marking
Basic instructions for pipe label design, and placement will help to improve facility efficiency and increase safety through visual communication.

Pipe Marking Importance
·         Safety-Eliminate accidents by minimizing identification errors.
·         Efficiency-No wasted time tracing pipes to their source.
·         Compliance - Reduce company liability and eliminate fines.



PIPE IDENTIFICATION STANDARD
The standard specifies the primary and secondary means of identifying pipe contents, as well as the size, color and placement of the identification device.
PRIMARY PIPE IDENTIFICATION
The text legend (name of pipe content) and directional arrow remain the primary means of identifying pipe contents. Attaching arrows at one or both ends of the marker indicates flow direction. See the ANSI/ASME size chart and installation guide in the following sections for more details.
SECONDARY PIPE IDENTIFICATION
A secondary means of pipe marker identification is the color code of the marker. The terminology of inherently hazardous or nonhazardous has been removed from the standard, effective since 2007.
Other significant color changes in 2007 included the addition of Brown/White for combustible fluids and Orange/Black for toxic or corrosive fluids.  The standard also identified four additional “defined by user” color combinations for additional customization options on non-standard markers. Those exact colors are the recommended safety colors contained in the ANSI Z535.1 standard.
The updates to ANSI/ASME A13.1-2015 added oxidizing fluids to the definitions for Yellow/Black, but did not add any new colors to the standard.

HOW TO PROPERLY LABEL PIPES
  1. Obtain a legend list of all pipe contents in your plant.
  2. Collect the following data on your piping systems (this may require tracing lines to determine quantities and sizes):

– Pipe contents
– Outside diameter of pipe (including insulation)
– Quantity of markers needed per ASME/ANSI A13.1 or other standards
– Pressure
– Temperature
– To/From information
– Location of specific legends by area (for aid in installation)
***Note: You may be able to use blueprints or P&IDs if they are current instead of walking down all of your lines. Seton also offers Take-Off Services to help you determine your pipe marking needs.
  1. Select color of marker.

Other color codes may also be acceptable, as long as your choices are consistent and documented, and the affected workers are trained to understand the system.
 Use clear and simple terms to identify the contents of each pipe.
        Text should be easy to read from a distance
        Use a sans-serif font such as Arial or Helvetica

Source: Creative Safety Supply & Graphic Products

Collected by 
Doshti
Indian Safety Association