Discipline Archive

Pumps & Mechanical Equipment

API 610 casing architecture comparisons (OH2, BB3, BB5), high-pressure impellers, and API 682 Plan 23 mechanical seal cooling loops.

API 610 pump selection guide showing OH2 overhung, BB3 axially split, and BB5 barrel casing cross-sections

17 min read•2026-03-30

API 610 Centrifugal Pump Selection Guide: OH2 vs BB3 vs BB5 for Boiler Feed Service

Comprehensive rotating machinery guide to selecting boiler feed pumps per API 610 / ISO 13709 standards. Detailed engineering comparisons between overhung OH2, axially-split BB3, and double-casing barrel BB5 architectures across temperature, pressure, and thermal shock envelopes.

Read Guide

API 682 Plan 23 mechanical seal cooling loop, pumping ring circulation, and energy savings comparison

15 min read•2026-04-15

API 682 Mechanical Seal Plan 23: High-Temperature Boiler Feed Pump Reliability

Comprehensive engineering analysis of API 682 Piping Plan 23 for high-temperature boiler feed pumps. Discover how internal bi-directional pumping rings circulate fluid through external seal coolers, saving up to 95% of thermal energy compared to Plan 21 while preventing seal face flashing.

Read Guide