The main body of the glass fiber reinforced plastic chimney is made up of the winding process. Quality specification and characteristics of FRP chimney
Although there is no clear standard for the quality requirements of FRP chimneys, it is possible to refer to other FRP or tank standards for the manufacture and inspection. Specific projects should have a special quality control requirements. The lining quality requirements of lining quality of FRP chimney is key to the corrosion resistance of the product, the chimney surface should be smooth, no impurities, no fiber exposed, without crack and impact on the use of performance without obvious scratches, defects, whitening and delamination may have concave diameter greater than 3mm, deep or higher than 5mm no, the bubble diameter is more than 10mm, 1 square decimeter range bubble may not exceed 7, otherwise it should be cut to repair, crack depth not greater than 2mm. The structure layer stack structure layer provides product quality requirements of strength and stiffness requirements, interlayer bonding, inclusions and resin nodules, do not allow non white, protruding height or depth of not more than 20% of the strength of layer thickness, crack depth not greater than 20% of the thickness of the design, the crack length shall not be greater than 30mm. In addition to the inspection of the appearance and size of the inner and outer surface of the product and the cutting section of the product, the quality inspection shall be carried out according to the requirements for the examination of the raw materials and the hardness test of the inside and outside surfaces. If necessary, the product should be tensile, bending and other mechanical properties of the test. In addition to the quality standard, the performance characteristics of FRP chimney here we also do some small supplement: 1 in the northern winter or need thermal places, glass steel chimney without insulation or heat insulation layer can achieve good insulation effect, this is due to the characteristics of FRP slow heat transfer decision the. 2 glass network has long service life; so when the FRP chimney steel production with high quality glass have a longer service life; 3 due to the small proportion of glass steel has, compared with other metal products easy to transport, so they support the amount of steel saving, comprehensive installation costs lower. Quality specification and characteristics of FRP chimney