(1) The lightning protection design plan is detailed and accurate on the description of the surrounding environment, geographical features, geological conditions, climate and disastrous weather characteristics, and lightning activity rules of the proposed building. The nature of the proposed building, its importance, the building's building structure, height, floor area, layout, equipment layout, communication methods, etc. are described in a comprehensive manner. Then the selection of the lightning protection category based on the above description is correct.
(2) Whether the technical measures and construction techniques adopted in the design plan are based on the latest relevant technical standards or specifications.
(3) Whether the materials, specifications, and arrangements of the air-termination devices, lead-off wires in the external lightning protection devices meet the requirements, whether the structural column bars are used as much as possible, and how the utilization rate is; whether the calculation of the specific protection range of the lightning rods is correct or not. Whether or not the object is protected from side-impact lightning and pressure equalizing ring devices; the grounding device utilizes the steel reinforcement in the pile, ground beam, and platform, whether the material, specification and layout of the artificial grounding body are reasonable, and whether the grounding device has anti-step-voltage measures or not. Various electrical reserve terminals are provided.
(4) Whether the use of frame structures including the shear wall structure to strengthen the shielding effect in the internal lightning protection measures, and whether the selection of power surge protection devices, installation locations, and energy coordination of power lines, antenna feeder lines, transmission lines, and communication systems are reasonable, Whether there is a detailed description and drawing of the schematic diagram of the surge protection (lightning arrester) circuit and the schematic diagram of the arrester installation position, whether the method of total equipotential bonding and local equipotential bonding is in accordance with the National Building Standard Design Atlas “Equipotential Bonding Installation†The requirements for the equipotential bonding of metal bridges, metal pipes, and metal windows, railings, and metal components at specified heights are sufficient.
(5) Whether the power supply and distribution standard adopts the TN-CS or TN-S system as far as possible; whether the erection scheme of the high and low voltage power lines is introduced as far as possible and whether the buried length is long enough.
(6) Whether the integrated wiring meets the specification requirements.
(7) Whether related drawings and data are normative, comprehensive and easy to implement.
Weld-Neck flanges or welding-neck flanges can be differentiated from all other types of flange by their long tapered hub. The Welding neck flanges is normally referred to as the high hub flange. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange. A weld neck flange (also known as a high-hub flange and tapered hub flange) is a type of flange. There are two designs. The regular type is used with pipes. The long type is unsuitable for pipes and is used in process plant. A weld neck flange consists of a circular fitting with a protruding rim around the circumference. Generally machined from a forging, these flanges are typically butt welded to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.
Welding Neck Flange,Welding Flanges,Butt Weld Fittings,ASME B16.5 Weld Neck Flanges
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