National Credential
Credential: API 510 Pressure Vessel Inspector  GI Bill resource
Credentialing Agency: American Petroleum Institute (API)

The API 510 Pressure Vessel Inspector certification is an intermediate-career level credential recommended for individuals who design, construct, repair, operate, or inspect pressure vessels. The API 510 Pressure Vessel Inspector certification validates an individual's knowledge related to maintenance, inspection, repair, and alteration of pressure vessels. The agency provides several combinations of education and experience pathways for candidates to meet the eligibility requirement. Applicants must have experience and knowledge of design, construction, repair, operation, or inspection of pressure vessels. The experience must have been acquired within the last 10 years while employed by, or under contract with, an authorized inspection agency.

More information can be found on the certifying agency's website.

Renewal Period: 3 years

API 510 Pressure Vessel Inspector

The following Army Occupations provide training and/or experience that contributes to attaining this credential:

Personnel Category Occupation Occupation Type Related As Promotion Points Skill Level Star Proponent Funded Gap Analysis
Enlisted 15D Aircraft Powertrain Repairer MOS other          
Enlisted 15H Aircraft Pneudraulics Repairer MOS other          
Enlisted 15T UH-60 Helicopter Repairer MOS other          
Enlisted 15U CH-47 Helicopter Repairer MOS other          
Enlisted 92F Petroleum Supply Specialist MOS other          
Enlisted 92L Petroleum Laboratory Specialist MOS some  Promotion Points: This certification has been approved for promotion points. Click for more information.        
Enlisted 92S Shower and Laundry Specialist MOS some  Promotion Points: This certification has been approved for promotion points. Click for more information.        
Warrant Officer 923A Petroleum Technician WOMOS some        

Army Table Legend


Related As

The military occupations shown in this table are related to this credential in one of four ways: Most, Some, or Other.

Most: This credential is directly related to most of the major duties associated with the military occupation (at least 80%). Note that the credential may require additional education, training or experience before you are eligible for it.

Some: This credential is related to some tasks associated with the duties of the military occupation (related 80% to at least one or more critical tasks but less than 80% of all of the entire military occupation). Note that the credential may require additional education, training or experience before you are eligible for it.

Other: This credential is related to this military occupation, but is more advanced or specialized and therefore will likely require additional education, training, or experience.

Promotion Points Promotion Points icon

This credential has been approved for promotion points for this MOS towards promotion to Sergeant and Staff Sergeant. Clicking the Promotion Points icon will open a link to the promotion points fact sheet.

Skill Level Designation

Skill Level I: This skill level consists of all Soldiers in the ranks of Private (pay grade E-1) up to Specialist (pay grade E-4). Time in Service (TIS) is generally between initial entry and four Years of Service (YOS). This skill level is Entry-level positions requiring performance of tasks under direct supervision.

Institutional training:

  • Structured Self-Development (SSD) level I
  • Basic Leader Course (BLC)

Skill Level II: This skill level is obtained when promoted to Sergeant (paygrade E-5). TIS is generally between 4-8 YOS. Positions requiring performance of more difficult tasks under general supervision; and in some instances, involving supervision of Soldiers in SL1.

Institutional training:

  • Structured Self-Development (SSD) level II
  • Advance Leader Course (ALC)

Skill Level III: This skill level is obtained when promoted to Staff Sergeant (paygrade E-6). TIS is generally between 8-12 YOS. Positions requiring performance of still more difficult tasks and involving first line supervision of Soldiers in SL1 & SL2.

Institutional training:

  • Senior Leader Course (SLC)
  • Structured Self-Development (SSD) level III

Skill level IV: This skill level is obtained when promoted to the rank of Sergeant First Class (paygrade E-7). TIS is generally between 12-18 YOS. Positions requiring relatively detailed knowledge of all tasks specified for a given MOS, normally involving first-line supervision of Soldiers in SLs 1, 2, and 3, and involving managerial duties.

Institutional training:

  • Master Leader Course (MLC)
  • Structured Self-Development (SSD) level IV
  • Senior Enlisted Joint Professional Military Education (SEJPME) I Course

Skill level V: This skill level is obtained when promoted to the rank of Master Sergeant (paygrade E-8). TIS is generally between 18-22 YOS. Positions requiring direct and indirect leadership roles with expertise in company and battalion-level operations and competency across a given CMF, serving as members of a staff at every level in the Army, with a full understanding of the allocation of resources and their utilization in order to accomplish Army functions and missions.

Institutional training:

  • United States Army Sergeants Major Academy (USASMA)
  • Structured Self-Development (SSD) level V

Skill level VI: This skill level is obtained when promoted to the rank of Sergeants Major (paygrade E-9). TIS is generally between 22-30 YOS. Positions requiring organizational leadership roles with multi-dimensional expertise in units and teams on division, corps, and Army staffs, integrated with Joint, Interagency, Intergovernmental, and Multinational (JIIM) partners with a full understanding of the Force Generation process, operations at all echelons, and how the Army runs.

Star Credential Star icon

Star credentials are MOS enhancing, as designated by the Proponent. MOS enhancing credentials are directly related to an MOS or ASI, are taught either partially or completely as part of a Program of Instruction (POI), and improve the MOS technical proficiency.

Proponent Funded Funded icon

This icon indicates credentials which Soldiers may have funded through their MOS proponent. Some proponents offer credentialing opportunities in conjunction with military training and/or as part of MOS development beyond the training base.

Gap Analysis Has Analysis icon

A detailed analysis comparing the credential requirements to the military occupation has been completed. Click on the gap analysis icon to view the analysis page.

API 510 Pressure Vessel Inspector

Eligibility Requirements ()

Note: This credential may have multiple options for becoming eligible. Listed below are the minimum requirements based on the minimum degree required. To view other options, see the Eligibility tab.

  • Credential Prerequisite
  • Experience: 5 years
  • Education
  • Training
  • Membership
  • Other
  • Fee

Exam Requirements ()

  • Written Exam
  • Oral Exam
  • Practical Exam
  • Performance Assessment

Renewal Period: 3 years

  • Continuing Education
  • Exam
  • Continuing Education OR Exam
  • Fee
  • Other

American Petroleum Institute (API)
1220 L Street, NW
Washington, DC  20005-4070
Phone: (202) 682-8000
Contact Page

API 510 Pressure Vessel Inspector

Applicant must meet any one education and/or experience requirement combination and the experience must have been acquired within the last 10 years while employed by, or under contract with, an authorized inspection agency as defined in API 510.

Option 1: Applicants must have a BS (or higher) in engineering or technology and one year minimum experience in supervision or performance of inspection activities of piping systems as described in API 510.

Option 2: Applicants must have two year degree or certificate in engineering or technology and two year minimum expereince in design, construction, repair, operation, or inspection of piping systems, of which one year must be in supervision or performance of inspection activities as described in API 510.

Option 3: Applicants must have a high school diploma or equivalent and three year minimum experience in design, construction, repair, operation, or inspection in-service piping systems, of which one year must be in supervision or performance of inspection activities as described in API 510.

Option 4: Applicants must have a minimum of five years experience in design, construction, repair, operation, or inspection in-service piping systems, of which one year must be in supervision or performance of inspection activities as described in API 510.

API 510 Pressure Vessel Inspector

  • Thickness Measurements, Inspection Intervals and Vessel Integrity
    • Corrosion Rates and Inspection Intervals
    • Joint Efficiencies
    • Static Head
    • Internal Pressure
    • Pressure Testing
    • Impact Testing
    • Weld Size for Attachment Welds at Openings
    • Nozzle Reinforcement
  • Welding Procedure and Qualification Evaluation
  • Non Destructive Examination
  • Practical Knowledge - General
    • Organization and Certification Requirements
    • Types and Definitions of Maintenance Inspections
    • Types of Process Corrosion and Deterioration
    • Modes of Mechanical, Thermal, and High Temperature Deterioration
    • Pressure Vessel Materials and Fabrication Problems
    • Welding on Pressure Vessels
    • Nondestructive Examination (NDE) Methods
    • Corrosion and Minimum Thickness Evaluation
    • Estimated Remaining Life
    • Inspection Interval Determination and Issues Affecting Intervals
    • Relief Devices
    • Maintenance Inspection Safety Practices
    • Inspection Records and Reports
    • Repairs/Alterations to Pressure Vessel
    • Rerating Pressure Vessels
    • Pressure Testing After Repairs, Alterations, or Rerating
  • Practical Knowledge - Specific (API 510, Pressure Vessel Inspection Code)

There are a number of resources available to help you prepare for the API 510 Pressure Vessel Inspector examination:

An additional resource is Safari Books Online, a searchable digital library that provides online access to thousands of books, training videos and conference sessions. See the Educational Resources page here on COOL to learn how to get free access.

Testing for this credential is handled by Prometric. The test centers are located in the U.S.

To find out more, use the following links on the Prometric website:

For more information on the American Petroleum Institute (API) testing process, visit the agency website.

API 510 Pressure Vessel Inspector

Renewal Period: 3 years

The API 510 Pressure Vessel Inspector credential has the following recertification information:

  • The certification term for API 510 is three years. API supplies further details about the requirements on the API 510 recertification page.