SPED Cheat Sheet 2026

The 30 highest-yield SPED facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the maximum interpass temperature typically specified for welding austenitic stainless steel pipe to control sensitization? → 350°F (177°C)
2. In gas pipeline design, the Weymouth equation is most accurate for: → High-pressure, large-diameter, long gas transmission lines
3. In the context of SPED certification, what is the most important consideration when implementing maintenance & turnaround planning? → Ensuring alignment with established standards, stakeholder needs, and best practices
4. Which of the following best describes a key competency required for corrosion prevention & protection in SPED practice? → Strong analytical skills combined with effective communication and ethical judgment
5. Which commissioning activity verifies that instrument transmitters are reading correctly at known process conditions before startup? → Loop checking
6. Which MSS standard governs the materials, design, and manufacture of pipe hangers and supports? → MSS SP-58
7. For two-phase gas-liquid flow, the Lockhart-Martinelli parameter X is used to characterize: → The ratio of frictional pressure drops of liquid and gas phases flowing alone
8. Which parameter is used to verify adequate cathodic protection of a pipeline per NACE SP0169? → -0.850 V vs. CSE
9. A pipe stress engineer discovers that the calculated sustained stress exceeds the allowable. Which corrective action is most effective? → Relocate or add pipe supports to reduce bending moments from weight
10. In Caesar II or similar piping analysis software, what does a 'restraint report' typically identify? → Forces, moments, and deflections at each support point
11. Which of the following is NOT a recognized type of pipe stress analysis per ASME B31.3? → Compressive buckling stress
12. For a valve in chlorine gas service, which packing material should be avoided due to attack by wet chlorine? → Neoprene elastomer
13. In the context of SPED certification, what is the most important consideration when implementing fluid dynamics & flow analysis? → Ensuring alignment with established standards, stakeholder needs, and best practices
14. The void fraction in two-phase flow is defined as the ratio of: → Gas cross-sectional area to total pipe cross-sectional area
15. In a 3D piping model, what is a 'nozzle' typically defined as? → A connection point on equipment (vessels, pumps, heat exchangers) to which piping connects
16. In turnaround planning, 'scaffolding pre-installation' is typically performed to: → Reduce critical path duration by completing non-critical work before shutdown
17. What is a 'pipe rack' modeled as in a 3D plant design tool? → A structural framework that supports multiple pipe runs routed across a process unit
18. What is 'mechanical completion' in the context of a piping turnaround? → All physical work is done and systems are ready for pre-commissioning checks
19. In hazardous area classification for plant layout, a Zone 1 or Division 1 area is defined as a location where flammable concentrations: → Exist intermittently under normal operating conditions
20. A 'pipeways' elevation drawing shows: → Elevation view of pipe rack tiers, pipe levels, and clearances
21. During commissioning, a 'functional test' of a pressure safety valve (PSV) verifies which parameter? → Actual lift pressure matches the set point stamped on the nameplate
22. Which material is preferred for piping that handles anhydrous ammonia due to its compatibility and cost-effectiveness? → Carbon steel (e.g., ASTM A106 Grade B)
23. In the context of OSHA 29 CFR 1910.147 Lockout/Tagout (LOTO), which energy source must be controlled when performing maintenance on a pressurized piping system? → All hazardous energy sources including stored pressure energy
24. Which AWS electrode classification is designed for vertical-up and overhead welding of carbon steel pipe using the SMAW process? → E6010
25. What ASME B31.3 hydrostatic test pressure multiplier is applied to the design pressure for normal fluid service? → 1.5×
26. ASME B31.3 Process Piping requires a minimum hydrostatic leak test pressure equal to how many times the design pressure? → 1.5 times
27. What is the recommended minimum road width for a main plant road that must accommodate two-way heavy vehicle traffic? → 20 feet
28. What is the purpose of nitrogen blanketing a piping system after a hydrostatic test and before drying? → To prevent oxygen ingress and internal corrosion while water is removed
29. What is the function of a decoupler (DC decoupler / isolating device) installed in a cathodic protection circuit? → Blocks DC current while allowing AC current to pass for safety grounding
30. For a piping system handling concentrated sulfuric acid (>93%) at ambient temperature, which material is typically most suitable? → Carbon steel