S
- S
- Safe Working Load
- Safety
- Safety Accessories (Art. 1, 2.1.3)
- Safety Assessment Federation
- Safety Critical Plant and Equipment
- Safety Extra-Low Voltage (SELV)
- Safety Hoop
- Safety Instrumented Function
- Safety Instrumented System
- Safety Integrity (SI)
- Safety Integrity Level (SIL)
- Safety Management System (SMS)
- Safety PLC
- Safety Related Alarm
- Safety Requirements Specification
- Safety Valve Operating Period
- Safety-Related Control System
- Safety-Related Protection Systems (SRPS)
- Safety-Related System
- Sample (ASTM E456)
- Sample (Tapping) Point
- Sampling Device
- Sampling System Lag
- Sand Foundation
- Schematic
- Screen
- Scroll
- Sealant Injection
- Seamless Pipe
- Secondary Barrier
- Secondary Seal
- Secondary Wind Girder
- Semi-Automatic Welding
- Sensitivity
- Sensor
- Set Pressure
- Shall
- Shell
- Shelving
- Should
- Shunt
- Side Entry Mixer
- SIL Claims for Equipment
- Single-Sided Weld
- Site Acceptance Test
- Slab Gate Valve
- Sleeved Plug Valve
- Soft Seated Plug Valve
- Soft Seated Valve
- Soft-desk
- Software
- Sound Engineering Practice (SEP) (Art. 3, 3)
- Sound Intensity Level
- Sound Level
- Sound-Power Level
- Sound-Pressure Level
- Source of Ignition
- Spark Testing
- Spatial Awareness
- Spiral Winding
- Spring Support – Examples: Variable Support, Constant Load Support, Spring Can
- SQL Injection
- Stairway
- Stale
- Standard Deviation (NPL G11(7), ASTM E456)
- Standard Pressure Test
- Standing
- State of Statistical Control (ASTM E456)
- Statistical Process Control (ASTM E456)
- Steel Mill
- Stepped Ramp
- Stiles
- Stilling Well
- Stockist
- Strip Mill
- Structured Query Language
- Sub-contractor
- Sump
- Super‐Duplex Stainless Steels
- Super‐Martensitic Stainless Steels
- Superimposed Back-Pressure
- Supervisor
- Supervisory Control And Data Acquisition
- Supplier
- Suppression
- Surveillance Level
- Susceptibility to Failure
- System
- System Life Cycle
- Systematic Error (ASTM E456)
- Systematic Failures (IEV 191-04-19)