API 570 Piping Programs, Circuit by Circuit
CML monitoring, deadlegs, injection points and the NDT data behind every corrosion rate.
API 570 Piping Inspection Services
API 570 covers in-service piping — the largest and most failure-prone asset class in any process facility. CIC delivers circuit-based piping inspection across Alberta: classification-driven intervals, CML thickness monitoring, targeted checks at deadlegs and injection points, and the in-house NDT that turns walkdowns into corrosion rates your program can trend.
The Program Work We Do
Circuit classification support — inspection priorities and intervals aligned to service class and consequence
CML thickness monitoring — repeatable UT at established locations, with corrosion rates and retirement-date math kept current
External visual inspections — supports, vibration, coating breakdown, insulation condition and CUI screening
High-consequence details — injection points, mixing tees, deadlegs and soil-to-air interfaces inspected on their own cadence
Follow-up NDT — profile RT for internal corrosion under fittings, PAUT corrosion mapping where thinning spreads beyond spot readings
Why Circuit Thinking Beats Pipe-by-Pipe Inspection
Piping fails by damage mechanism, and mechanisms follow process conditions — which is why API 570 organizes inspection by circuit rather than by drawing number. Coverage planned by circuit finds the thinning where the mechanism says it will be: downstream of injection points, in stagnant deadlegs, at the first elbow after a velocity change. Random sampling finds it by luck.
One Crew, Inspection Through Data
The most expensive part of piping inspection is getting people to the pipe — scaffold, rope access coordination, insulation removal windows. CIC crews carry both the inspection scope and the NDT scope in one mobilization: the same visit that walks the circuit takes the readings, shoots the profile RT, and maps the suspect area. Fewer mobilizations, faster closure, one report.
Frequently Asked Questions
How often does process piping need inspection under API 570?
Intervals follow piping class and corrosion rate: higher-consequence circuits (Class 1) see the shortest cycles, commonly with thickness monitoring at intervals derived from remaining-life calculations. Your circuitization and program documents set exact dates — we keep the data current so those dates are defensible.
What are injection points and deadlegs — and why the special attention?
Injection points are where chemicals or streams enter the pipe — localized turbulence and mixing accelerate corrosion just downstream. Deadlegs are stagnant sections where water and corrodents settle. Both thin faster than the surrounding circuit, so API 570 practice inspects them as their own targeted scopes.