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Exam (elaborations)

API 653 MSTS Data Sheets – Complete Study Guide 2025–2026

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Master API 653 MSTS Data Sheets with this well-written study guide for 2025–2026. Includes detailed explanations, examples, and practical applications for storage tank inspection, maintenance, suitability for service, corrosion evaluation, and repair documentation. Designed for engineers, inspectors, and professionals preparing for API 653 certification or recertification exams.

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API 653 DATA SHEETS (MSTS) WITH
WELL WRITTEN STUDY GUIDE

(Reference) FFS - ANSWER✔✔✨---API 579



(Reference) RBI - ANSWER✔✔✨---API 580



(Reference) Low Pressure Storage Tanks - ANSWER✔✔✨---API 620



(Reference) Cathodic Protection - ANSWER✔✔✨---API 651



(Reference) Tank Bottom Linings - ANSWER✔✔✨---API 652



(Reference) Welding on in service equipment containing flammables - ANSWER✔✔✨---API 2201



(Reference) NDE procedure guidelines - ANSWER✔✔✨---ASME section V



(Reference) Acceptance standards for RT, MT, and PT's of welds - ANSWER✔✔✨---ASME section
VIII, Div. 1



(Reference) Alt code to evaluate pits and LTA's - ANSWER✔✔✨---ASME section VIII, Div. 2



(Reference) Welder Qualification Code - ANSWER✔✔✨---ASME section IX



(Reference) Impact testing method and equip requirements - ANSWER✔✔✨---ASTM A370



(Reference) Welder Procedure Qualification Code - ANSWER✔✔✨---ASME section IX

,(Reference) New welding Electrodes - ANSWER✔✔✨---AWS



(Reference) NDE qualification - ANSWER✔✔✨---ASNT SNT-TC-1A



(Reference) API 650 annex for frangible roofs - ANSWER✔✔✨---Annex F



(Reference) API 650 annex for Hot tanks - ANSWER✔✔✨---Annex M



(Class Abbreviations) API 653 scope - ANSWER✔✔✨---AIRR (Alteration, Inspect, Repair,
Reconstruction)



(Class Abbreviations) API 653 AI's Employer - ANSWER✔✔✨---JUIC (Jurisdiction, User, Insurance,
Reconstruction)



(Class Abbreviations) API 653 Repair Organization - ANSWER✔✔✨---JOC (Jurisdiction, Owner,
Contractor)



(Dimensions) Linings, anchor profile of steel surface for installation of linings - ANSWER✔✔✨---1.5-
4.0 Mils



(Dimensions) Max Undercut for vertical - ANSWER✔✔✨---1/64"



(Dimensions) Max Undercut for Horizontal - ANSWER✔✔✨---1/32"



(Dimensions) Max diameter of surface porosity cluster - ANSWER✔✔✨---3/32"



(Dimensions) Max size of nameplate letters - ANSWER✔✔✨---5/32"

, (Dimensions) Max allowed discontinuity on bend test - ANSWER✔✔✨---1/8"



(Dimensions) Min external projection of bottom plate on existing tank (toe of shell to bottom fillet weld)
- ANSWER✔✔✨---3/8"



(Dimensions) Max peaking allowed on vert weld - ANSWER✔✔✨---1/2"



(Dimensions) When calculation tmin for shell LTA, minimum distance away from weld where "E" is
always 1.0 - ANSWER✔✔✨--->1" or 2t



(Dimensions) Min overlap of shell lap patch used to cover a hole (edge of hole to edge of patch) -
ANSWER✔✔✨---1"



(Dimensions) When performing PT, min distance to clean beyond area of examination -
ANSWER✔✔✨---1"



(Dimensions) When performing MT, min distance to clean - ANSWER✔✔✨---1"



(Dimensions) Max amount of banding allowed in a horz weld - ANSWER✔✔✨---1"



(Dimensions) Bottoms - Min overlap for single welded lap joints - ANSWER✔✔✨---1"



(Dimensions) Bottoms - Min external projection of bottom plate on a new tank - ANSWER✔✔✨---2"



(Dimensions) Vac Box - Min overlap of previously tested areas - ANSWER✔✔✨---2"



(Dimensions) Bottom Patch - Min overlap of bottom lap patch used to cover corroded area -
ANSWER✔✔✨---2"

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