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Street elbows are available with bend angles of 90°, 45°, and 22.5°. They can be used in many plumbing applications, including water supply, drainage, sewers, vents, central vacuum systems, compressed air and gas lines, heating and air conditioning, sump pump drains, and other locations where plumbing fittings would be used to join sections of pipe.
This naming convention applies to other plumbing elbows, such as: - "88 degree elbow" = 92 degrees on a protractor. Visualise bending the left end of the pipe up 88 degrees. Now turn the piece of pipe around so the horizontal piece of pipe is in line with the zero degrees line on the protractor. The protractor will read 92 degrees.
There are two major systems to classify ductwork airtightness, one based on European standards, the other based on ASHRAE standard 90.1-2010.Both are based on the leakage airflow rate at a given ductwork pressure divided by the product of the ductwork surface area and the same ductwork pressure raised to the power 0.65.
Round duct is made using a continuous spiral forming machine which can make round duct in nearly any diameter when using the right forming die and to any length to suit, but the most common stock sizes range evenly from 4" to 24" (10-60 cm) with 6"-12" (15-30 cm) being most commonly used. Stock pipe is usually sold in 10' (300 cm) joints.
As indicated in GR-3155, cable is typically placed into the duct in one of three ways: It may be pre-installed by the duct manufacturer during the extrusion process. It may be pulled into the duct using a mechanically assisted or hand-drawn pull line. It may be blown into the duct using a high air volume cable blowing apparatus.
The company was known as the Arms Corporation of the Philippines (Armscor) until 2017. [ 1 ] The company has been headquartered in Marikina , Philippines since 1958 [ 2 ] and represented in the United States by its subsidiary Armscor International, Inc., located in Pahrump, Nevada with facilities in Stevensville, Montana .
Newman Goldliner Inc. [12] – plied the Baclaran to Fairview route. Last served Cubao to Montalban route. Franchise taken over by First Metro Bus Express. Nova Auto Transport - renamed to Fairview Bus route; N.S. Transport Services, Inc. [12] – last served the Quezon Avenue to Montalban and Fairview to Ayala routes.
DWFM signed on in 1973 as MRS 92.3 (MRS meaning Most Requested Song), Manila's third FM station at that time. Having an adult contemporary format during its existence, the station is known for playing the most requested song every hour.