API 4G pdf free download
API 4G pdf free download.Operation, Inspection, Maintenance, and Repair of Drilling and Well Servicing Structures.
4.1.2 User/Owner Procedure Development
If the manufacturer of the equipment no longer exists or is unable for any reason to provide suitable recommendations, the user/owner should develop inspection, maintenance and repair procedures using applicable API and/or industry recommended practices and standards.
4.1.3 Background Information
Assembly drawings, drawings identifying critical areas, and acceptance criteria should be made available to the inspector for a Category IV inspection. In the absence of assembly or critical area drawings, or both, all areas of primary load carrying components shall be considered critical. This data shall be used by the inspector to adapt the inspection procedure. In addition, the users/owners may provide the history of repair, if available.
4.2 Personnel Qualifications
4.2.1 General
Inspection, maintenance, and repair procedures should be carried out by a person who, by possession of a recognized degree, certificate, or professional standing, or who by knowledge, training, or experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter, the work, or the subject. Inspectors should be familiar with the type of equipment to be evaluated.
4.2.2 Welder Performance Qualifications
Welders on derrick and mast repairs shall be certified in accordance with AWS Dl .1 or equivalent and should have experience in mast/derrick maintenance. All welding completed should be in accordance with the requirements of AWS Dl .1 or equivalent.
4.2.3 Category II Inspections
Personnel undertaking Category II inspections will be individuals designated by the owner/user company who have adequate experience and knowledge in masts/derricks. These individuals will typically be experienced field superintendents, engineers, or rig supervisory personnel.
4.2.4 Category Ill Inspections
The responsible individual conducting the Category Ill inspection shall be a qualified person and possess adequate knowledge, including knowledge of the primary load path and critical components, and experience in the inspection criteria specified for Category Ill inspections in 6.2.3 and as set forth in 4.2.1.
Typical qualified persons performing the inspection under the responsible individual may include engineers, original equipment manufacturer (OEM) technicians, nondestructive testing (NDT) technicians, senior operations person (rig superintendent, rig manager, or operations management), provided they meet the qualification criteria for their specific role in the inspection.
The responsible individual should engage other qualified individuals as necessary.
4.2.5 Category IV Inspections
The Category IV inspection should be conducted by or closely supervised by a Professional Engineer, OEM representative or other manufacturer of drilling structures authorized representative. In addition, Category IV inspectors should satisfy the requirements of Category Ill inspectors.The NDT inspectors for a Category IV inspection shall be required, as a minimum, to have certification as an ASNT Level II Technician per ASNT specification SNT-TC-1A, ISO 9712, or an equivalent standard. Personnel performing Category IV visual inspection of welds shall be qualified and certified as follows: — AWS certified welding inspector (CWI) or equivalent; or — an engineer or technician who, by training or experience, or both, in metals fabrication, inspection, and testing, is qualified to perform inspection of the work.
4.3 Training Proper training of personnel continues to be one of the most critical considerations in the care of a masts/derricks. This includes the rig personnel, mechanics, and welders, as well as the individuals providing inspection. Field personnel should be trained to conduct visual inspections as required for Category, I, II and III inspections. Training programs will assist field personnel to identify existing problems and ensure that all equipment involved will operate in the manner for which it was designed.API 4G pdf download.
