What is a Class 3 location?
What is a Class 3 location?
A Class 3 area is defined as “any Class Location Unit that has 46 or more buildings intended for human occupancy,” or any area where the pipeline lies within 100 yards of “a well-defined outside area” (such as a playground, recreation area or other place of public assembly), “that is occupied by 20 or more persons on …
What is a Class 1 pipeline?
Class 1: refers to any location within 220 yards of the pipeline that contains 10 or fewer. dwellings. Class 2: refers to any location within 220 yards of the pipeline that contains more than 10 and. fewer than 46 dwellings. Classes 1 and 2 generally are in unpopulated areas and are not covered by the CPUC’s order.
What is a class location?
– (1) A “class location unit” is an onshore area that extends 220 yards (200 meters) on either side of the centerline of any continuous 1-mile (1.6 kilometers) of pipeline. – (2) Each separate dwelling unit in a multiple dwelling unit building is counted as a separate building intended for human occupancy.
What is a Class 4 location?
(4) A Class 4 location is any class location unit where buildings with four or more stories above ground are prevalent. (c) The length of Class locations 2, 3, and 4 may be adjusted as follows: (1) A Class 4 location ends 220 yards (200 meters) from the nearest building with four or more stories above ground.
What is a pipeline HCA?
The U.S. Department of Transportation on-line glossary, defines an HCA as: “A location that is specially defined in pipeline safety regulations as an area where pipeline releases could have greater consequences to health and safety or the environment.
What is a Class 1 hazardous location?
flammable gases
Class I Locations A “Class I Location” is created by the presence of flammable gases or vapors in the air in sufficient quantities to be explosive or ignitable. When these materials are found in the atmosphere, a potential for explosion exists if an electrical or other source of ignition is present.
What is pipeline classification?
For Classification pipelines, the groups of users you upload (in ML terms, your positive and negative labels) will consist of sets of users who are known to share a particular trait, i.e. the positive set, as well as a set of users who are known to not share this particular trait, i.e. the negative set.
What B31 8?
ASME B31. 8 covers gas transmission and distribution piping systems, including gas pipelines, gas compressor stations, gas metering and regulation stations, gas mains, and service lines up to the outlet of the customer’s meter set assembly. It also serves as a companion to ASME’s other B31 codes on piping systems.
What is a high consequence Class 3 location?
The proposed definition included as high consequence areas: Class 3 and 4 locations as defined in 49 CFR part 192; areas where a pipeline is within 660 or 1000 feet of a building with mobility-impaired or confined persons (hospitals, schools, retirement and day-care facilities); and areas where a pipeline is within 660 …
What is potential impact radius?
Potential impact radius (PIR) means the radius of a circle within which the potential failure of a pipeline could have significant impact on people or property.
What is a Class 2 explosive?
Hazard Class 2 – Gases Flammable gases (2.1) burn readily in air and are in a gaseous state at 68°F (e.g., propane and spray paints). Non-flammable gases (2.2) may include liquified gases or cryogenic liquids (e.g., helium and asthma inhalers).
What is the difference between Class 1 Div 1 and Div 2?
Class 1 Hazardous Locations refer to facilities which deal with flammable gases, vapors, and liquids. Division 2 specifies that these flammable materials are handled, processed, or used in the defined hazardous location, but are not normally present in concentrations high enough to be ignitable.
Where are the class location units on a pipeline?
A “class location unit” is an onshore area extending 220 yards (660 feet) on either side of any pipeline longer than 1 mile. All onshore transmission pipelines are required to have block valves (i.e., valves intended to block flow) stationed at specified intervals,…
What are the different classes of pipelines?
Class 1 –Any location within 220 yards of either side of a 1 mile length of a pipeline containing 10 or fewer dwellings. Class 2 –Any location within 220 yards of either side of a 1 mile length of a pipeline containing more than 10 or and fewer than 46 dwellings.
How are pipeline locations classified in the CFR?
(b) Except as provided in paragraph (c) of this section, pipeline locations are classified as follows: (1) A Class 1 location is: (ii) Any class location unit that has 10 or fewer buildings intended for human occupancy. (2) A Class 2 location is any class location unit that has more than 10 but fewer than 46 buildings intended for human occupancy.
How are the locations of gas pipelines determined?
Locations along gas pipelines are divided into classes from 1 (rural) to 4 (densely populated) and are based upon the number of buildings or dwellings for human occupancy. Allowable pipe stresses, as a percentage of specified minimum yield strength (SMYS), decrease as class location increases from Class 1 to Class 4 locations.