API RP 2027-2002 pdf free download

API RP 2027-2002 pdf free download.Ignition Hazards and Safe Work Practices for Abrasive Blasting of Atmospheric Storage Tanks in Hydrocarbon Service.
1 General 1.1 SCOPE This recommended practice provides safe work practices for the prevention and control of ignition and other potential hazards during abrasive blasting of aboveground storage tanks in liquid hydrocarbon service at atmospheric pressure. It is generally recognized in the petroleum industry that the preferable method is to empty, vapor free and clean above- ground petroleum storage tanks before starting abrasive blast- ing work. However, this may not be practical or even possible, and may actually increase the risk of an undesirable hazard or incident in some situations. It is therefore necessary to understand the potential ignition and safety hazards when planning abrasive blasting and implement the appropriate safeguards before starting this work. This recommended practice does not cover all of the pre- cautions that may be required to safely perform abrasive blasting. Owners/operators and contractors shall conduct a thorough hazard analysis and pre-job start-up safety and health review for each speciÞc abrasive blasting job to assure that all necessary precautions and safeguards have been iden- tiÞed and implemented prior to beginning work. 1.2 APPLICABILITY This recommended practice applies to safe work practices required for abrasive blasting of exterior shells and exterior roofs of all aboveground atmospheric storage tanks in liquid hydrocarbon service. It also applies to safe work practices for abrasive blasting conducted on the roofs and inner portions of the exposed surfaces of shells (that portion of the shell above the roof level) on open-top (external) ßoating roof tanks. 1.3 IGNITION SOURCES This recommended practice also covers recognition and control of ignition hazards that are speciÞc to and which may be present during abrasive blasting of aboveground storage tanks in liquid hydrocarbon service at atmospheric pressure.
Although this recommended practice does not speciÞcally cover these tanks and vessels, many of the abrasive blasting recommendations and safe practices included herein would be applicable to these operations. Employers (owners/opera- tors and contractors) shall develop and implement speciÞc procedures for abrasive blasting on tanks and vessels not cov- ered by this recommended practice. 1.5 OTHER HAZARDS AND APPLICATIONS NOT COVERED This recommended practice does not cover speciÞc physi- cal, health or environmental hazards that are associated with abrasive blasting of aboveground storage tanks. It does not cover the hazards associated with the use of and exposure to abrasive grit and the dust, rust, scale, paint, and other material removed by abrasive blasting. This recommended practice does not provide any information for classiÞcation of tanks and tank roofs as conÞned spaces and entry into conÞned spaces, although such entry may be required for abrasive blasting on top of the ßoating roofs and interior shells of ßoating roof tanks. This recommended practice does not and cannot cover every possible unique hazard or situation that may arise dur- ing abrasive blasting on aboveground, atmospheric storage tanks in liquid hydrocarbon service. These site speciÞc, prod- uct speciÞc and tank speciÞc hazards and situations shall be identiÞed and addressed by employers (owner/operators and contractors), using appropriate principles and considerations provided in this recommended practice and other applicable regulations, codes, standards, recommended practices and publications, when developing and implementing safe abra- sive blasting procedures.
3 Definitions 3.1 GENERAL The following deÞnitions are applicable to abrasive blast- ing of aboveground petroleum storage tanks as described in this recommended practice. 3.2 DEFINITIONS 3.2.1 abrasive blasting: The removal of rust, deposits and/or residue from tank surfaces by using compressed air or water pressure to apply abrasive particles against the surface. 3.2.2 abrasive grit: An approved silica-free and arsenic- free, abrasive blasting material.