Piping systems, fabrication

The code prescribes minimum requirements for the materials, design, fabrication, assembly, support, erection, examination, inspection, and testing of piping systems subject to pressure or vacuum. The scope of the piping covered by B31.3 is illustrated in Fig. 10-124. It applies to all fluids including fluidized sohds and to all seivdces except as noted in the figure. 

Charging dust particles from coal charging should be evacuated by the use of jumper-pipe systems and steam injection into the ascension pipe or controlled by fabric filters... 

The ASME Boiler and Pressure Vessel Code, Section VIII, is the standard resource for the design, fabrication, installation, and testing of storage tanks and process vessels rated as pressure vessels (i.e., above 15-psig design). ASME B31.3 is a basic resource for process piping systems. 

Hydrogen piping systems shall be constructed in accordance with the requirements of this Chapter and the specified requirements of Chapters GR-1 and IP-2. The requirements apply to all fabrication, erection, and assembly operations or processes, whether performed in a shop or at a construction site. 

Inspections by owner include inspections, verifications, and audits of the construction of piping systems, which include fabrication, welding, heat treatment, assembly, erection, examination, and testing, in addition to the construction organization s documented procedures, personnel qualifications, and quality control records. 

Piping systems may be relatively simple or complex and may convey utility services and chemical fluids that can be highly flammable, highly toxic, corrosive, erosive, or any combination of these properties. Piping systems within chemical plants handling hazardous Iluids must be designed, fabricated, tested, operated, and maintained consid-... 

Tables 19.9 through 19.12 contain comprehensive unit prices and work hours for the fabrication and erection of process and interconnecting piping systems in carbon steel, 304 stainless steel, 316 stainless steel, and plastic-lined carbon steel pipe.

These comprehensive units, based on the models illustrated in Tables 19.13 and 19.14, include all the costs related to the fabrication, erection, and testing of piping systems, except the cost of valves, which are priced separately. 

---