{"id":6695,"date":"2024-10-16T18:43:47","date_gmt":"2024-10-16T18:43:47","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/astm-d7157\/"},"modified":"2024-10-24T10:44:46","modified_gmt":"2024-10-24T10:44:46","slug":"astm-d7157","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/astm\/astm-d7157\/","title":{"rendered":"ASTM-D7157"},"content":{"rendered":"<\/p>\n

1.1 This test method covers a procedure for quantifying the intrinsic stability of the asphaltenes in an oil by an automatic instrument using an optical device.<\/p>\n

1.2 This test method is applicable to residual products from thermal and hydrocracking processes, to products typical of Specifications D 396 Grades No. 5L, 5H, and 6, and D 2880 Grades No. 3-GT and 4-GT, and to crude oils, providing these products contain 0.5 mass% or greater concentration of asphaltenes (see Test Method D 6560 ).<\/p>\n

1.3 This test method quantifies asphaltene stability in terms of state of peptization of the asphaltenes ( S<\/span> -value), intrinsic stability of the oily medium ( So<\/span> ) and the solvency requirements of the peptized asphaltenes ( Sa<\/span> ).<\/p>\n

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.<\/p>\n

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use<\/span><\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\nScope
Referenced Documents
Terminology <\/td>\n<\/tr>\n
2<\/td>\nSummary of Test Method
Significance and Use
Interferences
Apparatus <\/td>\n<\/tr>\n
3<\/td>\nReagents and Materials
Sampling and Test Specimens
FIG. 1 <\/td>\n<\/tr>\n
4<\/td>\nPreparation of Apparatus
Quality Control Monitoring
Procedure
TABLE 1 <\/td>\n<\/tr>\n
5<\/td>\nCalculation of Results
Report
Precision and Bias
Keywords
FIG. 2
TABLE 2 <\/td>\n<\/tr>\n
6<\/td>\nA1. HAZARDS INFORMATION
A1.1 Introduction
X1. DETAILED AUTOMATIC TEST PROGRAM
X1.1
X1.2
X1.3
X1.4
X1.5 <\/td>\n<\/tr>\n
7<\/td>\nFIG. X1.1 <\/td>\n<\/tr>\n
8<\/td>\nFIG. X1.2 <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

D7157-09 Standard Test Method for Determination of Intrinsic Stability of Asphaltene-Containing Residues, Heavy Fuel Oils, and Crude Oils (n-Heptane Phase Separation; Optical Detection)<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASTM<\/b><\/a><\/td>\n2009<\/td>\n9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":6696,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2637],"product_tag":[],"class_list":{"0":"post-6695","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-astm","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/6695","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\/6696"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=6695"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=6695"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=6695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}