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  2. Loading arm - Wikipedia

    en.wikipedia.org/wiki/Loading_arm

    Swivel joints are required to provide the flexibility needed. The loading arm unfolds to get the required working envelope to load or unload the tanker, and the reverse is to retract or get a minimal space for parking or storage. Both types of loading arms may be mounted on a column or via a plate to an existing wall.

  3. Nominal Pipe Size - Wikipedia

    en.wikipedia.org/wiki/Nominal_Pipe_Size

    Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

  4. Swivel - Wikipedia

    en.wikipedia.org/wiki/Swivel

    A swivel joint for a pipe is often a threaded connection in between which at least one of the pipes is curved, often at an angle of 45 or 90 degrees. The connection is tightened enough to be water- or air-tight and then tightened further so that it is in the correct position.

  5. Flange - Wikipedia

    en.wikipedia.org/wiki/Flange

    A flange is a protruded ridge, lip or rim, either external or internal, that serves to increase strength (as the flange of a steel beam such as an I-beam or a T-beam); for easy attachment/transfer of contact force with another object (as the flange on the end of a pipe, steam cylinder, etc., or on the lens mount of a camera); or for stabilizing and guiding the movements of a machine or its ...

  6. List of skateboarding terms - Wikipedia

    en.wikipedia.org/wiki/List_of_skateboarding_terms

    The major components of the truck includes the base plate, axle, and the hanger. The truck bears the weight load of board. Axle: The axle is a metal rod which runs through the hanger and extends from it on either side. Wheels are inserted on either end and secured with the axle nut.

  7. Surface plate - Wikipedia

    en.wikipedia.org/wiki/Surface_plate

    The importance of the high-precision surface plate was first recognised by Henry Maudslay around 1800. He originated the systems of scraping a cast-iron plate to flatness, rubbing marking blue between pairs of plates to highlight imperfections, and of working plates in sets of three to guarantee flatness by avoiding matching concave and convex ...