{"id":596182,"date":"2024-11-05T21:46:24","date_gmt":"2024-11-05T21:46:24","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/iso-159712008\/"},"modified":"2024-11-05T21:46:24","modified_gmt":"2024-11-05T21:46:24","slug":"iso-159712008","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/iso\/iso-159712008\/","title":{"rendered":"ISO 15971:2008"},"content":{"rendered":"<p>ISO 15971:2008 concerns the measurement of calorific value of natural gas and natural gas substitutes by non-separative methods, i.e. methods that do not involve the determination of the gas composition, nor calculations from it. ISO 15971:2008 describes the principles of operation of a variety of instruments in use for this purpose, and provides guidelines for the selection, evaluation, performance assessment, installation and operation of these.<\/p>\n<p>Calorific values can be expressed on a mass basis, a molar basis or, more commonly, a volume basis. The working range for superior calorific value of natural gas, on the volume basis, is usually between 30 MJ\/m<sup>3<\/sup> and 45 MJ\/m<sup>3<\/sup> at standard reference conditions (see ISO 13443). The corresponding range for the Wobbe index is usually between 40 MJ\/m<sup>3<\/sup> and 60 MJ\/m<sup>3<\/sup>.<\/p>\n<p>ISO 15971:2008 neither endorses nor disputes the claims of any commercial manufacturer for the performance of an instrument. Its central thesis is that fitness-for-purpose in any particular application (defined in terms of a set of specific operational requirements) can be assessed only by means of a well-designed programme of experimental tests. Guidelines are provided for the proper content of these tests.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Natural gas \u2014 Measurement of properties \u2014 Calorific value and Wobbe index<\/b><\/p>\n<table style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/iso\/\"><b>ISO<\/b><\/a><\/td>\n<td>2008-12<\/td>\n<td>58<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":596194,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1066,2634],"product_tag":[],"class_list":{"0":"post-596182","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-75-060","7":"product_cat-iso","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/596182","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/596194"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=596182"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=596182"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=596182"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}