Welded steel pipe knowledge
Inoculating loop and needle are instruments used for inoculation, serial dilution, aseptic sampling, transfer and microbial sample coating. Options include color-coded disposable consumables made of materials such as polymers, aluminum, and other metals. The disposable inoculating loops and the inoculation needles are made of non-toxic (USP VI grade) polystyrene material, which can provide users with a smooth surface of the inoculation loop for use in vaccines and diagnostic kits, pharmaceuticals and biotechnology.
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1. Welded steel pipe for low-pressure fluid transportation (gb/t3092-1993) is also called general welded pipe, commonly known as black pipe. It is a welded steel pipe used for conveying general lower pressure fluids such as water, gas, air, oil and heating steam and other purposes. The thickness of the steel pipe is divided into ordinary steel pipe and thick steel pipe; the pipe end form is divided into non-threaded steel pipe (light pipe) and threaded steel pipe. The specification of the steel pipe is expressed by the nominal diameter (mm), and the nominal diameter is an approximation of the inner diameter. It is customary to use inches, such as 11/2. The welded steel pipe for low-pressure fluid transportation is mainly used as a raw pipe for galvanized welded steel pipe for low-pressure fluid transportation, in addition to being directly used for conveying fluid.
2. Galvanized welded steel pipe (gb/t3091-1993) for low-pressure fluid transportation is also called galvanized electric welded steel pipe, commonly known as white tube. It is a hot dip galvanizing (furnace welding or electric welding) steel pipe for transporting water, gas, air, oil, heating steam, warm water and other general lower pressure fluids or other purposes. The thickness of the steel pipe is divided into ordinary galvanized steel pipe and thick galvanized steel pipe; the connection end form is divided into non-thread galvanized steel pipe and threaded galvanized steel pipe. The specification of the steel pipe is expressed by the nominal diameter (mm), and the nominal diameter is an approximation of the inner diameter.
