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32 Cards in this Set
- Front
- Back
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Where is the Lap weld process used?
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In the manufacture of ferrous pipe up to about 30 inches in diameter.
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What is the function of the gate in a gate valve?
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Normally wedge shape it serves the same purpose as the disc in the glope valve.
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Where is welded steel pipe usually used aboard ship?
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For general service such as plumbing drains.
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Where is a shock resistant pipe nipple used?
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For root connections to machinery.
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Where is the Van stone flange used?
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In high pressure systems that are subjected to high temperatures and expansion strains.
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What type of material is used in the construction of the s-type inlet trap?
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Brass
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Where is Carbon Molybdenum alloy seemless steel tubing used?
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In high pressure steam lines that work at pressure of 401 to 1200 PSI and have an operating temperature of 875 degrees f
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Why are the use of fittings held to a minimum?
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Because they are a greater source for leaks.
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What is used to seal joints in steam, water, gas, air and oil lines and to seal connections which slide or rotate under operating conditions?
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Packing material.
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How are union bulkhead fittings designed?
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for 3000 psi water, oil or gas lines that pass through the bulkhead.
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Why are traps installed in steam lines?
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To remove condensate.
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What flange is intended for 150 PSI steam lines and is available in sizes up to six inches, galvanized or black?
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The malleable iron flange union.
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Where are welding processes primarily used?
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To manufacture iron and steel tubular products.
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What is the function of traps?
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To remove undesirable material.
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Where is the butt weld process used?
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In the manufacture of ferrous pipe up to about 4 inches in diameter.
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When is a tubular product actually called tubing?
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If its size is identified by the actual measured outside diameter, and by actual measured wall thickness.
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Which type of steam trap is suitable for pressure up to 150 PSI?
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The Bucket type.
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Where can a listing for the authorized asbestos substitutes be found.
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mil std 769
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What distinguishes one type of valve from another?
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the internal structure.
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What type of tubing is used primarily in dry lines in mag sprinkling and some structural applications?
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Aluminum alloy 6061
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Name three types of steam traps commonly used on ships?
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mechanical, thermostatic. and flash.
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What color are the handwheels for potable water?
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Dark Blue.
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Where are hydraulic control valves installed on ships?
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In the section of firemain that supplies water to the magazine.
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What is marked on most cast, wrought, or forged steel products?
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the word steel
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What is the mechanical type of steam trap?
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the ball float, and bucket.
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Where is PVC piping currently used on a ship?
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washdown systems.
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What is the first thing you do when placing the reducing valve in operation?
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Open the discharge valve.
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Where are butterfly valves used?
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In freshwater, saltwater, jp-5, fuel oil, diesel, and lube oil systems.
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What is the tensile strengh of welded structural steel tubing?
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50,000 PSI
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Where are caps used?
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For either permanent or temporary seals of pipe ends.
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Why are nominal dimensions used?
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To simplify the standardization of pipe fittings and pipe taps and threading dies.
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Which type of inlet trap is most commonly used for lavatories?
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the 1 1/2 s type
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