| Project
Bechtel Stainless Steel
Pipe Fabrication
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on Photo to Enlarge |
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| DBC
Pipe Fab Shop |
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| Bechtel
SS Spools Ready to Ship |
Owner
U. S. Department of
Energy
Hanford Nuclear Reservation
Richland, WA
General
Contractor & Engineer
Bechtel National, Inc.
Completion
Date
2010
Project
Description
DBC was contracted in
2003 by Bechtel National, Inc. to fabricate stainless steel pipe
spools for a $5 Billion, 10 year project to construct waste treatment
and immobilization facilities at the Hanford Nuclear Reservation.
When completed in 2010, these facilities will process 200 Million
Liters of radioactive waste from 67 leaking underground storage
tanks ultimately converting it into glass (vitrification) in preparation
for permanent long term storage underground storage.
To date, the DBC pipe
fabrication shop has fabricated 100,000 linear feet of pipe into
over 6,000 pipe spools in both 304 and 316 stainless steels and
diameters ranging from ½” to 10”. Most of these
spools included complex bends, valves and multiple diameters.
Spool Isometric drawings
were transmitted electronically, and then further processed into
shop fabrication drawings using a piping computer assisted design
program. A sophisticated database management system was developed
to provide for managing the large number of spools, production
and quality control, documentation, status tracking, management
reporting, and invoicing.
Quality control requirements
included 100% traceability for all components, and Positive Material
Identification (PMI) on a significant percentage of the work.
PMI provides a quantitative chemical analysis of each alloy. Material
Certifications from component suppliers and PMI chemical analysis
confirmation documentation was required to accompany each spool
shipped.
Project
Challenges & Solutions
The project was complicated
by a “verbatim compliance” unit pricing contract and
exceptionally stringent quality control and documentation requirements.
For
additional information on the Bechtel/Hanford Project
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