Process ECP-2E Specifications 9-7

Table 9-2 Construction Materials for Process ECP-2E

Solution
Plastics
(Polyvinyl
Chloride or
Polyolefins)
Titanium Hastelloy C Austenitic
Stainless Steel
AISI Type 316
*
* AISI Type 316 Stainless Stee l has been extensively te sted and is satisfacto ry for the uses listed in the table above. Refer to The SPSE Handbook of
Photographic Science and Engineering, Materials of Construction for Photographic Processing Equipment Section for information on other Austenitic
Stainless Steels.
Bleach (Ferricyanide or “UL”):
Tanks and Racks •
†
† Plastic s compatible with low pH solutions should be used (e.g., polyvinyl chloride, polypropylene, and high-density polyethylene). The compatibility of other
plastics should be evaluated under actual use.
••
Mixing Tanks •
†
••
Replenisher Holding Tanks •
†
••
Piping, Pumps, Valves, and Filter Cores •
†
••
Overflow Holding Tank •
†
••
Bleach (Persulfate):
Tanks and Racks •
†
••
Mixing Tanks •
†
•••
‡
‡ Short-ter m storage of persulfate bleach in stainless steel tanks is acceptable.
Replenisher Holding Tanks •
†
••
Piping, Pumps, Valves, and Filter Cores •
†
••
Overflow Holding Tank •
†
••
Accelerator:
Tanks and Racks •
†
•••
Mixing Tanks •
†
•••
Replenisher Holding Tanks •
†
•••
Piping, Pumps, Valves, and Filter Cores •
†
•••
Stop:
Tanks and Racks •
†
••
Mixing Tanks •
†
•••
§
§ Provided th e concentration of sulfuric acid specified for the stop is not exceeded and fresh replenisher is always used.
Replenisher Holding Tanks •
†
•••
§
Piping, Pumps, Valves, and Filter Cores •
†
••
Others:
Tanks and Racks ••••
Mixing Tanks ••••
Replenisher Holding Tanks ••••
Piping, Pumps, Valves, and Filter Cores ••••