Liquid Penetrate Inspection

State Energy Inspection Services provides premium Liquid Penetrate (LP) examination, which provides the inspection and testing coverage necessary on the end portions of tubulars not covered during Ultrasonic testing on Non-Ferrous material. The coverage for this examination is 18 inches from each end including pin and coupling threads. Liquid Penetrate examination may consist of the following inspection and testing methods:

  • Visual thread inspection
  • White light inspection
  • Liquid Penetrant testing of the external and internal surfaces utilizing the visible-water washable method

Operator Qualifications

The operators who inspect require a minimum Level I inspector qualification while under direct supervision of an on-site Level II or Level III Supervisor. Operators performing SEA inspections must be able to distinguish J1 letters at 12 inches on a Jaeger eye chart and have no color vision impairment.

Reference Documents

  • API RP5A5
  • API 5CT
  • API 5L
  • API 5D
  • ASTM E165
  • Customer Specification, as applicable

Inspection Equipment

  • Acetone cleaner
  • Penetrant and Developer of the same manufacture
  • Steam cleaner and low pressure water spray
  • Test block-cracked
  • Lint free cloth
  • Tools for imperfection evaluation

Download State Energy Inspection Services Liquid Penetrate Inspection Standard Operating Procedure (SOP) Document.