Onshore steel transmission · Material properties · 49 CFR 192.607
Material Verification Sampling Program
Sizes the 49 CFR 192.607 (Mega Rule) sampling program — excavations (1/mile, cap 150), NDT readings (≥10/location), the properties to verify, and the 95%-confidence expanded-sampling trigger.
Segment & Records
mi
Test Method
rdgs
Engineering Basis
Excavations = min(⌈segment length, mi⌉, 150) — one per mile rounded up, capped at 150 (§192.607(e)).
NDT: ≥5 places in ≥2 circumferential quadrants → ≥10 readings per pipe-cylinder location; method validated per §192.607(d).
Properties: diameter, wall thickness, seam type, grade/SMYS, UTS, chemistry, and CVN toughness when the assessment requires it.
Unexpected results → expand sampling to ≥95% confidence (§192.607(e)).
Destructive yield/UTS per API Spec 5L; both methods permitted.