Pascal Engineering, Inc. - General Contractors
Provides quality Design Build solutions for all businesses
We do all process piping ourselves. Pascal Engineering can install the following
process piping system:
PVC/CPVC
Easiest and most cost efficient to install (In some municipalities, PVC is not an acceptable material for pipes)
Galvanized/Threaded
Threading pipes over 1" requires a motorized threading machine. Threading pipes over 4" is not cost effective.
Copper Piping
Soft solder is 95% Tin and 5% Antimony. It is appropriate for many low temperature and low-pressure applications. A flux is required prior to brazing. The flux is considered a contaminant, and it is generally not permitted to be used in high purity applications.
Silver solder consists of up to 15% silver and 5% Phosphorus. It is used for high temperature and high-pressure applications. Silver solder does not require the use of flux and hence is desirable for high purity applications. This method is more expensive because it is more labor intensive.
Polypropylene Piping
Polypro is inexpensive and a very inert material. It is best suited for corrosive materials. It is also used in high purity DI water applications in lieu of PVC piping. There are two ways to weld piping together: Socket welding and Butt-welding. It is hard to maintain precise pipe penetration during socket welding. Socket welds create a lot of dead spaces. It is not recommended for High purity applications. Butt-welding will give much cleaner welds. Both methods of welding require specialized welding machines.
PVDF Piping
PVDF is considered the king of inert materials. It can also be used in elevated temperatures where Polypro will loose its strength. The piping material is fairly expensive. There are two ways to weld PVDF piping together: Socket welding and Butt-welding. It is hard to maintain precise pipe penetration during socket welding. Socket welds create a lot of dead spaces. It is not recommended for High purity applications. Butt-welding will give much cleaner welds. Both methods of welding require specialized welding machines.
Orbital Welding
Orbital welding is used to join together stainless steel or Hastelloy tubing. Typically the tubing is 1" or smaller in diameter. It is the only approved method for several toxic gasses used in semiconductor industry. It requires very specialized and expensive welding machine. The welding machine is first programmed to make satisfactory welds, after that the welds are consistent and of high quality.
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