Planning

Module from the Inspection and NDE Curriculum curriculum.

Module 5 - Inspection Planning · Learning Objectives · 1. Select CML (condition monitoring location) density per API 570 · 2. Identify critical locations: elbows, deadlegs, injection points · 3. Apply damage mechanism review (DMR) per API 571 · 4. Develop inspection strategy with metallurgist + operations input · 5. Document strategy in Inspection Plan (API 510/570 require) · Damage Mechanism by Service (API 571)

Mechanism	Service	Temp Range	Detection	Mitigation	Ref
Uniform corrosion	Most	Ambient to 900F	UT thickness	CA, material upgrade	API 571 sec 4
High temp H2 attack (HTHA)	H2 + hot hydrogen	>430F	UT, PMI	Nelson Curve material	API 571 sec 5.1.3.1
Sulfidation	Sulfur + hot HC	550-1100F	UT, PMI	5-9Cr alloys	API 571 sec 5.1.3.2
Naphthenic acid (NAP)	Acid crude	440-700F	UT, sampling	316L or higher	API 571 sec 5.1.2.5
Amine SCC	Amine	>180F	PT/MT after PWHT	PWHT, hardness <22 HRC	API 571 sec 4.5.7
Wet H2S (SSC/HIC)	Sour service	<150F	WFMT, UT	PWHT, NACE material	API 571 sec 4.5.1.1
Caustic cracking	NaOH	>140F + conc	PT, MT	Nelson-like caustic chart	API 571 sec 4.5.3
Cooling water MIC	MIC in CW	Ambient	UT, bacteria test	Biocide program	API 571 sec 4.3.1
Chloride SCC	Cl + SS	>150F	UT, PT	316L or duplex	API 571 sec 4.5.1.2
CUI (under insulation)	Hot insulated	140-300F	Strip + VT, NDE	Coating, insulation QA	API 571 sec 4.3.8

Source: Inspection_NDE_Curriculum_v1.xlsx · Sheet: Planning

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