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This document provides testing procedures for evaluating proppants used in hydraulic fracturing and gravel packing operations. NOTE Proppants mentioned in this document refer to sand, ceramic, resin-coated, gravel packing proppants, and other materials used for hydraulic fracturing and gravel packing operations. This document supplements API RP 19D, 2nd edition (2021), the requirements of which are applicable with the exceptions specified in this document. This document provides consistent methodology for testing performed on hydraulic fracturing and/or gravel packing proppants. It is not intended for use in obtaining absolute values of proppant pack conductivities under downhole reservoir conditions.

This document specifies requirements for surface preparation, materials, application, inspection and testing of internal coating lining systems that are intended to be applied on internal surfaces of steel storage tanks of crude oil, hydrocarbons and water for corrosion protection. It covers both new construction and maintenance works of tank internal coating and lining as well as the repair of defective and deteriorated coating/lining. This document also provides requirements for shop performance testing of the coated/lined samples and the criteria for their approval.

This document specifies a test method for continuous process analysis (real-time analysis) using near-infrared spectroscopy for the indirect determination of the following fuel-characterising parameters:

— total chlorine content;

— water content;

— heating value.

NOTE When accuracy is proven, real-time analysis can be supplemented by further fuel-characterising parameters.

This document applies to solid recovered fuels according to ISO 21640.

This document specifies a method for the determination of cetane number of diesel fuels by air flow regulation in a standard test engine. This document is applicable to various types of diesel fuels, including vehicle diesel, bio-diesel, synthetic diesel, and similar unconventional products. The cetane number measurement range is from 0 CN to 100 CN, whereas a typical cetane number range of 25 CN to 70 CN. However, the precision for synthetic and unconventional diesel has not been established.

This document provides guidelines on implementation and application of the concept of metrological traceability in measurements supporting the exploration, upgrading, transmission, distribution and use of natural gas, biogas, biomethane and other substitutes. The guidance aims at implementing requirements such as those laid down in ISO/IEC 17025:2017 6.5. The measurement of flow rate, composition, temperature, pressure and natural gas properties are covered. The document also addresses the metrological traceability of properties calculated from other quanties, such as pressure, temperature and composition.

This document describes how calibration, quality control and the evaluation of measurement uncertainty aid to establishing and underpinning the metrological traceability of measurement results. Requirements for the certification of traceable calibration gas mixtures and test gases are also addressed in this document.

Finally, the guidance extends to the measurement of the quantity and energy supplied or received, such as described in ISO 15112. Whereas it is recognised that the measurement of quantity and energy is in practice often implemented as a computational process using measurement data, this document takes the view that the purpose of the measurement is the quantity and energy, and that the measurements made in gas metering serve the purpose of providing metrologically traceable results as input for the measurement of quantity and energy.

This document specifies the technical delivery conditions for corrosion-resistant alloy seamless products for casing, tubing, coupling stock and accessory material (including coupling stock and accessory material from bar) for two product specification levels: PSL-1, which is the basis of this document; PSL-2, which provides additional requirements for a product that is intended to be both corrosion and cracking resistant for the environments and qualification method specified in Annex G and in the ISO 15156 series or NACE MR0175. This document contains no provisions relating to the connection of individual lengths of pipe. Demonstration of conformance to ISO 15156-3:2020 or NACE MR0175-2021 of material affected by end sizing, connection manufacture or welding operations is outside the scope of this document. This document contains provisions relating to marking of tubing and casing after threading. This document is applicable to the following five groups of products: a)      group 1, which is composed of stainless alloys with a martensitic or martensitic/ferritic structure; b)      group 2, which is composed of stainless alloys with a ferritic-austenitic structure, such as duplex and super-duplex stainless alloy; c)       group 3, which is composed of stainless alloys with an austenitic structure (iron base); d)      group 4, which is composed of nickel-based alloys with an austenitic structure (nickel base); e)      group 5, which is composed of bar only (Annex F) in age-hardened (AH) nickel-based alloys with austenitic structure.

This document specifies methods using sieving for the determination of the quantity of coarse particles of binder present in bituminous emulsions and for the determination of storage stability. WARNING - The use of this document can involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use. In addition, for environmental aspects, it is important to limit the quantities of products, solvents and energy sources to reduce the emissions in air and water and the wastes to the minimum required for a valid test realization.