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An introduction to the oil and petroleum-product analysis and quality-control tests at the Niroo Gostar Lian laboratory \u2014 from ash determination to the cloud point of fuels: for each test, its purpose and scope, a summary of the method, and the reference ASTM and national standards.<\/p>\n","protected":false},"featured_media":0,"menu_order":1,"template":"","ngl_catalog_cat":[],"class_list":["post-3372","ngl_catalog","type-ngl_catalog","status-publish","hentry"],"acf":[],"yoast_head":"\nOil & Petroleum Products Laboratory Catalog - Niroo Gostar Lian Technical Inspection Company<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ngllab.com\/catalog\/oil-catalog\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oil & Petroleum Products Laboratory Catalog\" \/>\n<meta property=\"og:description\" content=\"An introduction to the oil and petroleum-product analysis and quality-control tests at the Niroo Gostar Lian laboratory \u2014 from ash determination to the cloud point of fuels: for each test, its purpose and scope, a summary of the method, and the reference ASTM and national standards.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ngllab.com\/catalog\/oil-catalog\/\" \/>\n<meta property=\"og:site_name\" content=\"Niroo Gostar Lian Technical Inspection Company\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-16T22:16:59+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/ngllab.com\\\/catalog\\\/oil-catalog\\\/\",\"url\":\"https:\\\/\\\/ngllab.com\\\/catalog\\\/oil-catalog\\\/\",\"name\":\"Oil & Petroleum Products Laboratory Catalog - Niroo Gostar Lian Technical Inspection Company\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/ngllab.com\\\/#website\"},\"datePublished\":\"2026-09-27T10:09:44+00:00\",\"dateModified\":\"2026-10-16T22:16:59+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/ngllab.com\\\/catalog\\\/oil-catalog\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/ngllab.com\\\/catalog\\\/oil-catalog\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/ngllab.com\\\/catalog\\\/oil-catalog\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/ngllab.com\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u06a9\u0627\u062a\u0627\u0644\u0648\u06af\u200c\u0647\u0627\",\"item\":\"https:\\\/\\\/ngllab.com\\\/catalogs\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Oil & Petroleum Products Laboratory Catalog\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/ngllab.com\\\/#website\",\"url\":\"https:\\\/\\\/ngllab.com\\\/\",\"name\":\"Niroo Gostar Lian Technical Inspection Company\",\"description\":\"Standards-partner testing laboratory, technical inspection and calibration in Bushehr\",\"publisher\":{\"@id\":\"https:\\\/\\\/ngllab.com\\\/#organization\"},\"alternateName\":\"Niroo Gostar Lian\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/ngllab.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/ngllab.com\\\/#organization\",\"name\":\"Niroo Gostar Lian Technical Inspection Company\",\"url\":\"https:\\\/\\\/ngllab.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/ngllab.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/ngllab.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/ngl-logo-square.png\",\"contentUrl\":\"https:\\\/\\\/ngllab.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/ngl-logo-square.png\",\"width\":600,\"height\":600,\"caption\":\"Niroo Gostar Lian Technical Inspection Company\"},\"image\":{\"@id\":\"https:\\\/\\\/ngllab.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"description\":\"Established in 2007, Niroo Gostar Lian was among the first private laboratories in southern Iran to cooperate with the General Directorate of Standards. 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