{"id":114802,"date":"2024-10-19T02:58:50","date_gmt":"2024-10-19T02:58:50","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/astm-d4702-2006\/"},"modified":"2024-10-24T22:15:24","modified_gmt":"2024-10-24T22:15:24","slug":"astm-d4702-2006","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/astm\/astm-d4702-2006\/","title":{"rendered":"ASTM-D4702 2006"},"content":{"rendered":"

ASTM D4702-06<\/h3>\n

Historical Standard: Standard Practice for Quality Management of Mechanical Coal Sampling Systems<\/h4>\n
\n

ASTM D4702<\/h4>\n

Scope<\/strong><\/p>\n

1.1 This practice is applicable to cross-belt, falling stream, and auger sampling systems.<\/p>\n

1.2 Spacing of increments pertains to the kind of interval between increments. Intervals can be defined in quantitative terms, such as units of time or mass, or in terms of position over the lot.<\/p>\n

1.2.1 Spacing of Increments for Cross-Belt and Falling Stream SamplersCross-belt and falling stream type mechanical sampling systems take increments based on time, either at fixed time intervals or at random times during a fixed time strata. Some falling stream samplers can take increments based on equal mass of coal sampled as determined by scales. The sections of this practice that pertain to cross-belt and falling stream samplers describe procedures for only time-based sampling systems. This time-based inspection guideline will satisfy most criteria for mass-based or combination mass-based and time-based sampling systems. If there are items that are not covered, the inspector should refer to the manufacturer’s literature.<\/p>\n

1.2.2 Spacing of Increments for Auger SamplingThe spacing of increments collected by auger sampling systems is defined in terms of position over the lot.<\/p>\n

1.3 It is essential that the inspector have the documentation listed in Section of this practice when conducting an inspection.<\/p>\n

1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.<\/p>\n

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. For a specific hazard statement, see Section 5.<\/p>\n

Keywords<\/strong><\/p>\n

coal sampling; inspection; mechanical sampling; sampling systems<\/p>\n

ICS Code<\/strong><\/p>\n

ICS Number Code 75.160.10 (Solid fuels)<\/p>\n

DOI:<\/strong> 10.1520\/D4702-06<\/p>\n<\/div>\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
Significance and Use
Hazards <\/td>\n<\/tr>\n
2<\/td>\nAssessing the Organization and Planning of Sampling Operations
General Observations of Coal Stream Variability as Related to Primary Increment Collection by Falling Stream and Cross-Belt Samplers
General Observations of Auger Placement
Inspection of the Primary Sampler in Time-Based Cross-Belt or Falling Stream Sampling Systems <\/td>\n<\/tr>\n
3<\/td>\nInspection of Augers
Criteria for Secondary Sampler Operation
Criteria for Tertiary or Final Sampler Operation <\/td>\n<\/tr>\n
4<\/td>\nCautions for Collecting Final Sample
General Considerations to be Observed by the Inspector
Keywords <\/td>\n<\/tr>\n
5<\/td>\nA1. TEST METHOD FOR ESTIMATING THE OVERALL VARIANCE FOR INCREMENTS
A1.1 Scope
A1.2 Procedure
A1.3 Calculation
TABLE A1.1 <\/td>\n<\/tr>\n
6<\/td>\nX1. TYPICAL MECHANICAL COAL SAMPLER CHECKLIST
TABLE A1.2 <\/td>\n<\/tr>\n
8<\/td>\nX2. MONITORING COAL SAMPLING RATIOS USING CONTROL CHARTS
X2.1 Scope
X2.2 Rationale (Commentary)
X2.3 Data Collection and Charting Procedure
X2.4 Detection of Special Causes (Out-of-Control Conditions)
FIG. X2.1 <\/td>\n<\/tr>\n
9<\/td>\nX2.5 Monitoring the Coefficient of Variation
X2.6 Monitoring the Average Observed Sampling Ratio
TABLE X2.1 <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

D4702-06 Standard Practice for Quality Management of Mechanical Coal Sampling Systems<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASTM<\/b><\/a><\/td>\n2006<\/td>\n9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":114803,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1073,2637],"product_tag":[],"class_list":{"0":"post-114802","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-75-160-10","7":"product_cat-astm","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\/114802","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\/114803"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=114802"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=114802"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=114802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}