{"id":137,"date":"2026-07-12T21:13:44","date_gmt":"2026-07-12T13:13:44","guid":{"rendered":"https:\/\/themebb.com\/en\/archives\/137"},"modified":"2026-07-12T21:13:44","modified_gmt":"2026-07-12T13:13:44","slug":"what-are-api-618-and-api-619","status":"publish","type":"post","link":"https:\/\/themebb.com\/en\/archives\/137","title":{"rendered":"What Are API 618 and API 619"},"content":{"rendered":"<h2>API RP 618 and API RP 619: analysis of core differences<\/h2>\n<p>API RP 618 (<em>Recommended Practice for Reciprocating Compressors for Petroleum, Chemical, and Gas Industries<\/em>) and API RP 619 (<em>Recommended Practice for Rotary Type Positive-Displacement Compressors for Petroleum, Refining, and Related Industries<\/em>) all are American Petroleum Institute (API) the recommended practice standards issued provide technical guidance for the design, selection, installation and maintenance of reciprocating and rotary volume compressors respectively.<\/p>\n<h2>Key differences<\/h2>\n<ul>\n<li><strong>different applicable models<\/strong>: API RP 618 focuses on reciprocating compressor (such as piston type), emphasizing pulse control, piping vibration analysis and valve reliability;<\/li>\n<li><strong>API RP 619<\/strong>facing rotary compressor (such as screw type, sliding plate type and Roots type), it focuses on rotor dynamics, bearing life, sealing system and lubrication management;<\/li>\n<li>both are not mandatory regulations, but are widely adopted as engineering benchmark by global oil and gas and chemical projects.<\/li>\n<\/ul>\n<p>It is worth noting that, API RP 618 released Version 5 (RP 618-5) in 2023, while API RP 619 version 4 (RP 619-4) is still valid. The two together constitute API important pillar of compressor standard system.<\/p>\n<p>Reciprocating Compressor<br \/>(API RP 618)<\/p>\n<p>Rotary compressor<br \/>(API RP 619)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>API RP 618 is suitable for reciprocating compressor, focusing on pulse and vibration control; API RP 619 emphasizes rotor dynamics and sealing performance for rotary compressor (such as screw type). Both are recommended technical specifications widely used in petrochemical industry.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","zob_sync_key":"zsync_9d2f3dfba0b1c7ddfd133e26","zob_sync_source_post_type":"post","zob_sync_lang":"en-US","zob_sync_source_url":"https:\/\/themebb.com\/blog\/archives\/200.html","zob_sync_key_version":"v1","zob_sync_source_blog_id":"1","zob_sync_source_post_id":"200"},"categories":[23],"tags":[],"class_list":["post-137","post","type-post","status-publish","format-standard","hentry","category-haha"],"_links":{"self":[{"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/posts\/137","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/comments?post=137"}],"version-history":[{"count":0,"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/posts\/137\/revisions"}],"wp:attachment":[{"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/media?parent=137"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/categories?post=137"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/tags?post=137"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}