7 look forward to
The fact that reachs application through old development makes clear, the progress of RPM pipeline industry of our country is slower, compare with photograph of industrial developed country, in raw material, tooling, technology management, project the respect such as limits of standard of standard of design, product, construction, application is existing very big difference.
7.1 raw material
7.1.1 colophony
Foreign conduit uses colophony property tall, breed complete, seriation; Benzene not saturated polyester already was occupied 30% much, already became gradually general-purpose colophony of not saturated polyester, the basis uses need, a variety of special colophony and auxiliary satisfy a requirement. And our country conduit uses resin 90% it is colophony of not saturated polyester with adjacent benzene model give priority to, general-purpose occupy 60 ～ about 70% . Benzene polyester colophony has the production of thimbleful only between, and the price is expensive. High-powered special colophony does not have other almost. These elements were affected use.
7.1.2 enhance material
Abroad has what suit those who twine need and deserve to have a variety of special size to not have twist cloth of material of roving, felt, pane. Norms is much, breed is whole, quality actor, satisfy use requirement. Home recommends Bo fine manufacturer except minority useful and special those who twine size without twist outside roving, factory of major Bo fine produces without alkaline, medium alkaline twine without twist roving lacks special size, wellability is accordingly poorer. Bad distribution of felt material some, so country increases material norms, breed to cannot satisfy production to place the need of arenaceous glass steel tube well.
7.2 twine equipment and pipe fitting
What home introduces at present is self-restrained utilization rate of tubal product line has 20% to control only, twine shaping craft to occupy other to shape only 3.5% of craft, remain to develop the market further, sufficient play has the productivity of equipment. At present large requirements pipe fitting uses hand paste and eject law to shape more, not form a complete set, quality is poor.
7.3 technologies manage
Manufacturer of a lot of glass reinforced plastics lack technical person with ability now, worker culture is low, professional quality is poor, form a product not to have a design, select material does not have a standard, examine without the method, the product does not have examining situation; The result causes quality accident, make the user produced very great psychogenic disorder to RPM piping products thereby, affected the promotion of RPM conduit and application severely.
The price of steel tube of 7.4 clip arenaceous glass
The steel tube price that conduit of glass reinforced plastics compared the diameter that be the same as a canal in the past is high 30% ～ 50% , integrated cost is lower than steel tube however 20% ～ 30% , but one-time investment is too high, construction unit is accepted hard however with use unit. New product places what arenaceous glass reinforced plastics is in charge of to appear, lowered the price of conduit substantially, however the key of the problem is to should make people realises conduit of large requirements RPM is defeated by water the integrated benefit in project application and now as actual as what with price of caliber steel tube difference narrows.
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