API STD 19C-ed.2

Annotation of standard text API STD 19C-ed.2 :

API STD 19C, 2nd Edition, August 2018 - Measurement of and Specifications for Proppants Used in Hydraulic Fracturing and Gravel-packing Operations

This document provides specifications and standard testing procedures for evaluating proppants used in hydraulic fracturing and gravel-packing operations.

The objective of this document is to provide specifications and a consistent methodology for testing performed on hydraulic fracturing and/or gravel-packing proppants. Methodologies and specifications (where applicable) are provided for:

— sieve analysis and median diameter determination;

— sphericity and roundness;

— acid solubility;

— turbidity;

— loose pack bulk density, apparent density, and absolute density;

— crush resistance;

— loss on ignition.

Proppant size designation is as per industry standard. It is based on the maximum and minimum size determination by sieve analysis and ASTM 1 sieve number (and not as per standard opening expressed in micrometers).

Proppants in this document are sand, ceramic media, resin-coated proppants, gravel-packing media, and other similarly used materials for hydraulic fracturing and gravel-packing operations.

1 ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.