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Pressure-retaining items can be registered with the National Board, requiring certain uniform quality standards be achieved certifying the manufacturing, testing, and inspection process. To obtain a certification the registered items have to be inspected by National Board-commissioned inspectors and built to required standards.
The Hartford Steam Boiler Inspection and Insurance Company (HSB) is a global specialty insurer and reinsurer headquartered in Hartford, Connecticut. It was founded in 1866 and is the largest provider of equipment breakdown insurance and related inspection services in North America serving over five million commercial locations.
Kinks in flexible ducting must be avoided. Some flexible duct markets prefer to avoid using flexible duct on the return air portions of HVAC systems, however flexible duct can tolerate moderate negative pressures. The UL181 test requires a negative pressure of 200 Pa. To use flexible ducting in a system, make sure to pull the duct tight so you ...
CCTV drain cameras, also known as sewer cameras or pipe inspection cameras, are a line of waterproof, high definition cameras that have become a widely popular technology in the plumbing profession. These cameras are advanced diagnostic tools that allow plumbers to execute plumbing inspections, called CCTV Drain Surveys [1] with heightened ...
A building inspection is an inspection performed by a building inspector, a person who is employed by either a city, township or county and is usually certified in one or more disciplines qualifying them to make professional judgment about whether a building meets building code requirements.
Pipeline video inspection is a form of telepresence used to visually inspect the interiors of pipelines, plumbing systems, and storm drains.A common application is for a plumber to determine the condition of small diameter sewer lines and household connection drain pipes.
Soft (or ductile) copper tubing can be bent easily to travel around obstacles in the path of the tubing. While the work hardening of the drawing process used to size the tubing makes the copper hard or rigid, it is carefully annealed to make it soft again; it is, therefore, more expensive to produce than non-annealed, rigid copper tubing.
The ductile iron used to manufacture the pipe is characterized by the spheroidal or nodular nature of the graphite within the iron. [2] Typically, the pipe is manufactured using centrifugal casting in metal or resin lined moulds. [3]
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