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Pultruded Fiberglass Classification Of Structural Materials
- Jul 04, 2017 -

Pultruded Fiberglass Classification of structural materials

This specification describes the classification, error, defects, workmanship, inspection, physical properties, mechanical properties and design properties of glass reinforced fiber pultruded structural materials. 1.2 This standard is defined by ASTM (American Society for Testing and Materials), supplemental information available from suppliers of pultruded materials. The purpose of this specification is not to limit the technical changes agreed by both the pultruded material supplier and the cooling tower manufacturer. 1.3 Test and describe the properties of the material under laboratory tests under controlled conditions. Prior to use, the user of the document develops appropriate safety and health measures and determines the applicability of the limits. Section 2. Applicable documents (omitted) Section 3. Terminology 3.1 Definitions of terms related to standard -137 (see appendix - terminology) 3.2 Pultrusion - through a liquid resin pool for reinforcing materials such as glass fiber roving, glass fiber mats and various The impregnated material is then passed through a preformer and then thermally solidified by a chemical reaction. The other cure is cured by a radio frequency preheater, which is particularly suitable for the processing of heavy materials, The material will be cooled by water or air and then into the wire drawing machine, which can be squeezed using a tracker or reciprocating machine, and the final material will be cut to the desired length. 3.3 Definitions of terms related to panning can be found in ASTM D-883 and ASTM D-3918. 3.4 Where there are specific physical performance requirements for the material, other enhanced types of materials such as carbon fibers and aromatic nylon fibers may be used, but the use of these specific properties should be negotiated by the manufacturer of the pultruded material and the manufacturer of the cooling tower.

Section 4. Classification 4.1 4.1.1 - Type I - Pultruded glass fiber rods that do not contain synthetic veils and meet the minimum mechanical performance requirements in Table I / 1A. 4.1.2 - Type II - pultruded fiberglass slabs containing synthetic veils or polyester fiber yarns that meet the minimum mechanical performance requirements in Table I / 1A. 4.1.3 - Type III - Standard for pultruded glass containing synthetic polyester fiber yarns that meet the minimum mechanical performance requirements in Table I / 1A. 4.1.4 - Type IV - Modification of the Type II, Type III of the Specified Pultruded Product or Buyer's Pledged Manufacturer's Agreement. 4.2 Pultruded glass fiber structure products can use a variety of resin systems, selected resin systems, enhanced volume and type, load, surface material, fire rating and method, and temperature requirements are determined by the product corrosion resistance and cost of several Factor. The flame resistance of the composite material can be achieved by several different techniques, using a halogenated resin, or using a composite material containing a halogenated resin but containing a halogenated additive, although the fire resistance requirement should be The complex is associated with a particular resin. The choice of resin is determined by the environment in which the components are located, such as the chemical environment of recirculating water and air, the temperature limit, the fire spread / combustion grade, etc. For this reason, the manufacturer of the cooling tower should contact the manufacturer of the pultruded material to obtain the pultrusion Material manufacturer's recommendation on resin; Resin grade is as follows: 4.2.1 - Class 1 - A heterophthalate polyester resin with a fire spread of ≤ 25 according to UL's vertical burning test of ASTM E-84 or 94 VO. 4.2.2 - grade 2 - isohexan polyester resin (without flame retardant additives). 4.2.3 - Grade 3 - Vinyl ester fire retardant resin according to ASTM E-84 or 94 VO UL, fire spread ≤ 25. 4.2.4 - grade 4 - vinyl ester resin (without flame retardant additives). 4.2.5 - Level 5 - Resin selected by other manufacturers of cooling towers and pultruded product suppliers (if there is a fire resistance requirement, the flame spread level must be specified according to ASTM E-84 or UL flame Spread level). For additional properties, additives may be added to the final compound (ie, release agent, filler, UV inhibitor, or antimony trioxide).