Pressure Settings and Design Basis

Unfired steam boilers, i.e., nominally termed waste heat boilers or, heat exchangers, which generate steam by heat interchange wiLh other fluids (See ASME code [1] Par. U- 

Optional TFE liner blocks water and dirt from disks in open vents. 

DUPLEX Disks extend corrosion resistance to highly oxidizing agents, halogens except free fluorine, and virtually all other corrosives. A sheet of PTFE is used as a barrier on the service side of the disk. See page 12. Additionally, these disks are processed to accommodate temperatures to 392F without insulation. 

INSULATED Disks are available in MONO, INVERTED, and DUPLEX styles to accommodate temperatures exceeding 338F to 700F. They are furnished as an attached unit as shown because the nameplate rating of the disk must be established at the cold face temperature of the insulation. 

should be equipped with pressure relieving devices required by the ASME Code, Section I, as far as applicable otherwise, use Par. UG-125. Vessels, which per Par. U-1 (g)), follow Par. UG-125ff are  

---