API SPEC 10A pdf download

API SPEC 10A pdf download Cements and Materials for Well Cementing
4 Requirements
4.1 Specification, Chemical, and Physical Requirements
4.1.1 Classes and Grades
4.1.1.1 General Well cements shall be specified using the classes A, B, C, D, G, or H and the grades ordinary (O), moderate sulfate-resistant (MSR), and high sulfate-resistant (HSR). Composite well cements shall be specified using classes K and L, consisting of Portland cements and additional composite constituents according to Annex B. A well cement that has been manufactured and supplied in accordance with this specification may be mixed and placed in the field using alternate water ratios and/or additives. It is not intended that manufacturing compliance with this specification be based on such field conditions. Processing additives, set modifying agents, or chemical additives used to reduce chromium (VI) shall not prevent a well cement from performing its intended functions.
4.1.1.2 Class A This product is obtained by grinding clinker that consists of hydraulic calcium silicates and contains one or more forms of CaSO 4 as an interground additive. Processing additives used in the manufacture of Class A cement shall meet the requirements given in ASTM C465.
NOTE This product is intended for use when special properties are not required and is available only in O grade, similar to the requirements given in ASTM C1 50 for Type I cement.
4.1.1.3 Class B This product is obtained by grinding clinker that consists of hydraulic calcium silicates and contains one or more forms of CaSO 4 as an interground additive. Processing additives used in the manufacture of Class B cement shall meet the requirements given in ASTM C465. NOTE This product is intended for use when conditions require moderate or high sulfate resistance and is available in both MSR and HSR grades, similar to the requirements given in ASTM C1 50 for Type II cement.
4.1.1.4 Class C This product is obtained by grinding clinker that consists of hydraulic calcium silicates and contains one or more forms of CaSO 4 as an interground additive. Processing additives used in the manufacture of Class C cement shall meet the requirements given in ASTM C465. NOTE This product is intended for use when conditions require high early strength, and is available in O, MSR, and HSR grades, similar to the requirements given in ASTM C1 50 for Type III cement.
4.1.1.5 Class D This product is obtained by grinding clinker that consists of hydraulic calcium silicates and contains one or more forms of CaSO 4 as an interground additive. Processing additives used in the manufacture of Class D cement shall meet the requirements given in ASTM C465. Further, at the option of the manufacturer, suitable set-modifying agents may be interground or blended during manufacture.
NOTE This product is intended for use under conditions of moderately high temperatures and pressures and is available in MSR and HSR grades.
4.1.1.6 Class G This product is obtained by grinding clinker that consists of hydraulic calcium silicates and contains one or more forms of CaSO 4 as an interground additive. No additives other than CaSO 4 , water, or chemical additives as required for chromium (VI) reduction shall be interground or blended with the clinker during manufacture of Class G well cement, provided that such additives do not prevent the well cement from performing its intended purpose. NOTE This product is intended for use as a basic well cement and is available in MSR and HSR grades.
4.1.1.7 Class H This product is obtained by grinding clinker that consists of hydraulic calcium silicates and contains one or more forms of CaSO 4 as an interground additive. No additives other than CaSO 4 , water, or chemical additives as required for chromium (VI) reduction shall be interground or blended with the clinker during manufacture of Class H well cement, provided that such additives do not prevent the well cement from performing its intended purpose. NOTE This product is intended for use as a basic well cement and is available in MSR and HSR grades.
4.1.1.8 Composite Well Cements See Annex B for information on composite well cements.