The surface of resin-rich layer should be smooth and clean, without damage, whitening, delamination, foreign inclusion and exposed fiber. The convex-concave larger than 3mm in diameter and 0.5mm in depth (height) is not allowed; For the pressure vessel, the max. allowable air bubble is 4mm in diameter. Within the area of 1 m2, the air bubble within DN 4mm should be no more than 3, otherwise the repair should be given; the depth of crack should be no more than 0.2mm.
The outer surface should be smooth and even color without whitening. Fiberglass must be impregnated with resin. Foreign inclusion, exposed fiber, interlayer delamination, delamination and resin blister, etc. are prohibited.
For the resin content, it should be more than 90% in resin-rich layer, more than 75±5% in middle layer, more than 35±5% in structural layer and more than 90% in outer layer.
The taper angle at the inner wall of tank is no more than 1°.
Under the loading condition, the allowable hoop strain should not exceed 0.1%.
When the winding layers are wound at helical winding angel 80°, its tensile strength should be equal to or more than 15MPa.
Barcol hardness on proudct's surface should be no less than 40.
Water absorption should be no more than 0.3%.
Length tolerance (distance between the peaks of two ends) is 1%.
The tolerances of tower's straightness and installation verticality are both 1/1000mm tower's height.
The difference between the max. diameter and min. diameter from the same section of the shell should not exceed 0.5% of shell ID.
Hengshui Aoliande Trade Co., Ltd. is professional company which to market & sell FRP Pipe, FRP storage tank, FRP molded products, FRP pultrused products and FRP production machines, through the continuous development and introduction of professionality and technology, the company rely on advanced technology, exquisite craftsmanship, reliable quality and perfect service, passed ISO9001, ISO14001, OHSAS18001 management system certification, now we have 50+ staff, annual sales of glass fiber reinforced plastic series products achieved 5,000,000 USD, products have been sold to all over the world, USA, Brazil, Japan, Germany, India, Malaysia, Egypt etc, and won the support and trust from new & old customers.
Our customers and certificates
Q: Are you a commercial company or manufacturer?
A: We are a company with commercial company and factory together. Our trading company is called Hengshui Aoliande Trading Co., Ltd and the factory is called Hengshui Jiubo Composites Co., Ltd.
Q: I didn't see the dimension information or find the size I need, can you do it according to my requirements?
A: For FRP products, all dimensions can be customized. We can do it at the customer's request.
Q: How long is the delivery time?
A: Generally it is 5-10 days if the goods are in stock. Or it is 15-20 days if the products are not in stock, it is according to the quantity.
Q: Do you provide samples? Is it free or extra?
A: Yes, we could offer the sample for free, but not pay the freight cost.
Q: What are your payment terms?
A: Payment <= 1000USD, 100% in advance. Payment> = 1000USD, 30% T / T in advance, balance before shipment.
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