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Various types of flanges are available, depending on construction. Flanges used in piping (orifice, threaded, slip-on, blind, weld neck, socket weld, lap-joint, and reducing) are available with a variety of facings, such as raised, flat, and ring-joint. Flange connections tend to be expensive because they require the precision forming of metal.
Carrigan et al. [4] used a pipe crawler operating in the K-band frequency range (18-16.5 GHz) to inspect HDPE pipe for various defects that would be commonly found in buried and undersea pipelines. Three types of set-ups were used to model the conditions of above ground pipelines, plastic lined metal pipe, and undersea pipelines.
Most weld purging is carried out on joints made by the TIG or GTAW arc welding process. [6] When the laser welding process is chosen, joints or welds being made on reactive materials will need to be carried out and in the case of electron beam welding, this is carried out in a vacuum, in which case purging takes place by complete evacuation of all gas.
HDPE pipe is a type of flexible plastic pipe used to transfer fluids and gases. It is often employed for replacing aging concrete or steel main pipelines . Constructed from the thermoplastic HDPE (high-density polyethylene ), it has low permeability and robust molecular bonding, making it suitable for high-pressure pipelines .
According to a 2008 study by Koo et al., ductile iron pipe had the lowest impact on natural resource depletion, compared to HDPE pipe and PVC pipe. [ 30 ] In November 2012, ductile iron pipe manufactured in the United States received certification as a sustainable product from the Institute for Market Transformation to Sustainability.
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Unlike conventional ultrasonics, there are an infinite number of guided wave modes that exist for a pipe geometry, and they can be generally grouped into three families, namely the torsional, longitudinal and flexural modes. The acoustic properties of these wave modes are a function of the pipe geometry, the material and the frequency.
Oil prices dipped on demand concerns, with brent down 0.44 at $73.09 a barrel. [O/R] (Reporting by Ankur Banerjee and Tom Wesbrook in Singapore, and Alun John in London, additional reporting by ...
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