NSF ANSI 358-2:2017 pdf download.Polypropylene Pipe and Fittings for WaterBasedGroundSource“Geothermal”Heat Pump Systems.
The physical and performance requirements in this standard apply to plastic piping system components as well as non-plastic components of the ground loop heat exchanger including but not limited to pipes and fittings used in water-based ground-source heat pump systems This Standard is intended for ground loop heat exchangers with a maximum temperature and pressure of 140 °F (6000) at 100 psi. Water- based ground-source heat pump systems commonly include the use of anti-freeze, heat transfer fluids or other chemical additives. This standard does not cover refrigerant based ground loop heat exchangers such as direct expansion (DX) systems. This standard does not cover hydronic heating or cooling systems within buildings.
2 Normative references
The following documents contain provisions that. through reference, constitute provisions of NSF ANSI 358-2. At the time NSF ANSI 358-2 was balloted, the editions listed below were valid. All documents are subject to revision, and parties are encouraged to investigate the possibility of applying the recent editions of the documents indicated below. The most recent published edition of the document shall be used for undated references.
Normative References for Polypropylene Pipe and Fittings for Water-Based Ground-Source ‘Geothermal” Heat Pump Systems:
ASTM D2290-12 Standard Test Method for Apparent Hoop Tensile Strength of Plastic or Reinforced Plastic Pipe by Split Disk Method
ASTM D2837-13 Standard Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials or Pressure Design Basis for Thermoplastic Pipe Products
ASTM D543-06 Standard Practices for Evaluating the Resistance of Plastics to Chemical Reagents3 ASTM F1588-96 (2015) Standard Test Method for Constant Tensile Load Joint Test (CTLJT)
ASTM F412-12 Standard Terminology Relating to Plastic Piping Systems3
ASTM F2389-1O Standard Specification for Pressure-rated Polypropylene (PP) Piping Systems3
3 Definitions
Terms used in this Standard that have a specific technical meaning are defined here.
3.1 compound: A mixture of polymers with other ingredients such as fillers, stabilizers, catalysts, processing aids, lubricants, modifiers, pigments, or curing agents.
NOTE — Compounds are considered materials; however, not all materials are considered compounds. 3.2 contamination: The presence of a substance not intentionally incorporated in a product.
3.3 critical dimensions: Dimensions of a product (e.g., pipes and fittings) that directly affect the fit and function, or the capacity of making a sound joint, or both.
3.4 fitting: A piping component used to join, terminate, or provide changes of direction in a piping system.
3.5 ground-source heat pump system: A terminology used to describe a variety of mechanical systems that use the ground, groundwater, or surface water as a heat source or heat sink. Systems can be further described as ground-coupled. groundwater and surface water heat pump systems.
3.6 hydrostatic design basis (HDB): One of a series of established stress values specified in ASTM D28373 for a plastic compound. obtained by categorizing the long-term hydrostatic strength determined in accordance with ASTM D28373.
3.7 hydrostatic design stress (HDS): The estimated maximum tensile stress a material is capable of withstanding continuously with a high degree of certainty that failure of the pipe will not occur. This stress is circumferential when internal hydrostatic water pressure is applied.
3.8 joint: The location at which two pieces of pipe or a pipe and a fitting are connected together. Various joint types not defined in this standard shall be defined by ASTM F4123.
3.10 plastic pipe: A hollow cylinder of plastic, in which the wall thicknesses are usually small when compared to the diameter, and in which the inside and outside walls are essentially concentric.NSF ANSI 358-2pdf download.