ฝาปิดบ่อพักโดยทั่วไปซึ่งมากกว่า 95% ที่ใช้กันอยู่แล้ว ผลิตจากเหล็กหล่อ Cast iron ductile เนื่องจากเป็นวัสดุที่ใช้กันมานานตั้งแต่มีการคิดค้นและพัฒนาระบบฝาบำบัดบ่อพักระบายน้ำขึ้นมา การใช้เหล็กหล่อมาทำฝาปิดบ่อพักมีข้อดีเป็นที่นิยมรู้จักกันดีโดยเฉพาะในการกำหนดคุณสมบัติของทางราชการที่ต้องใช้เฉพาะฝาบ่อวัสดุนี้ ปัจจุบันวิวัฒนาการผลิตจากวัสดุอื่นมาทดแทนเริ่มก้าวหน้าขึ้น แต่ก็ยังไม่เป็นที่รู้จักในตลาด วัสดุทดแทนเหล็กที่สามารถใช้งานได้อย่างเหมาะสมได้แก่ ไฟเบอร์กล๊าส FRP Fiberglass (Composites) เนื่องจาก ฝาบ่อที่ผลิตจากไฟเบอร์กล๊าส สามารถแก้ปัญหาต่างๆที่เกิดจากการใช้ฝาเหล็กหล่อได้ดี เช่น ฝาบ่อเหล็กมักจะถูกถอดขโมยไปขายในร้านรับซื้อของเก่าทำให้เกิดปัญหามีคนหรือรถร่วงตกลงไปจากรูที่ฝาบ่อเหล็กโดนขโมยแล้วยังไม่มีใครมาซ่อมแซมให้ดีพอ ปัญหาฝาบ่อเหล็กเป็นสนิมผุกร่อนผุพังทำให้เสื่อมสภาพเร็วถ้าสัมผัสน้ำบ่อยๆ ในบางอุตสาหกรรมเช่นโรงงานอาหารสมัยใหม่จะไม่อนุญาตให้ระบบบำบัด ราง ฝาท่อ มีสิ่งเจือปนจากสนิมสารผุกร่อน ทำให้ผู้ปฏิบัติงานอาจเดินบนฝาเสียดสีเกิดเป็นฝุ่นละอองติดเข้าไปในส่วนผสมของการผลิตอาหารได้ หรือปัญหาฝาบ่อเหล็กมีเสียงดัง มีกลิ่นจากการปิดสนิท ฯลฯ








Feature of FRP Fiberglass Manhole Covers Grating | FRP ManholeCover ฝาปิดท่อระบายน้ำ ฝาบ่อพักสําเร็จรูป

1.) FRP fiberglass Manhole Covers Have ZERO Scrap Value and Eliminate Manhole Lid Theft
Cast iron manholes and metal manhole lids are being stolen every day. Thieves are stealing the cast iron manhole covers for scrap allowing vehicles, people or animals to drop in the hole. Just look at the Google News Results for Manhole Injury. FRP fiberglass Manhole Covers offer a quick, easy and affordable way to prevent manhole cover theft. FRP or FRP fiberglass manhole covers have no scrap value. When would be thieves discover they are not dealing with cast iron, they simply move on to the next city or source of scrap.

2.) FRP fiberglass Manhole Covers Reduced Weight = Reduced Worker Injuries
FRP fiberglass Manhole Covers are much lighter and are easier for utility works to handle and place. Cast iron manhole covers normally weigh between 100 to 200+ pounds. FRP fiberglass manhole covers and plastic manhole covers reduce weight by 63% to 85%! Which manhole cover would you rather lift? Iron or FRP fiberglass? What about kicking that cast iron manhole cover into place? Which one manhole lid would you rather have drop on you?









3.) FRP fiberglass Manhole Covers Stay Where They Should Be – Locked Into Place
Manhole lids that have popped off are a big problem and liability for utilities. Sewer backups, storms, flooding, vandals and even truck tires can cause the lids to be knocked out of place or even missing manhole covers. The callout costs due to this have become much higher and losses due to liabilities are mounting. Cast iron manhole covers or lids are typically held in place by the weight of the lid. Frp fiberglass manhole covers or FRP manhole lids are normally secured with a locking mechanism or worm gearWhile cast iron lids have long been fitted with locks, even the best locks can be defeated with tools, torches or brute force. The crooks can still swipe your cast iron manhole lid in just a few seconds. Once a manhole lid is off or missing, the sewer or storm sewer is open to children, bikes, cars, animals, debris or even worse. In contrast, plastic manhole covers are locked down and secured with a unique worm gear that ensures the lid stays where it should be. Do you need a more secure manhole? Ask about our high security and individually keyed high security FRP manhole covers.

4.) FRP fiberglass Manhole Covers Are Fully Traffic Rated
FRP fiberglass Manhole Covers are available in fully traffic rated versions that offer 30% more weight loading than the current US DOT / highway legal weight limits. Our FRP / FRP fiberglass manhole covers comply to the following standards:




5.) FRP fiberglass Manhole Covers Can Reduce Inflow & Infiltration in Sewers
Manholes are a major source in wastewater collection systems or sewer systems. Old school cast iron manhole lids are designed to be loose-fitting. This inherent design flaw allows more surface water into our collection systems and sewers. All of this excess water still has to be treated at the sewer plant. Tight fitting FRP fiberglass manhole lids and covers are manufactured to tighter tolerances and can greatly reduce inflow and infiltration (I&I). Add manhole ring seals to your installation and these plastic manhole covers become very effective in eliminating a source surface water infiltration. FRP fiberglass or FRP manhole covers help:
• Reduce energy used for pumping excess water from liftstations and pump stations to the treatment plant
• Reduce wastewater treatment costs – less power, fewer chemicals and smaller facilities required
• Keep excess water, spills and runoff out of our sewers and stormwater systems
• Keep more oil and contaminants out of sewers, stormwater systems, creeks, rivers, lakes and oceans

6.) FRP fiberglass Manhole Covers Are Ideal for Corrosive Environments
Sewer and wastewater systems can be highly corrosive. Hydrogen sulfide gas is commonly found in these systems. It is corrosive, very poisonous, heavier than air, flammable and even explosive. When dissolved in water, it becomes a weak acid called hydrosulfuric acid or sulfhydric acid. FRP fiberglass manhole lids and frames are perfect for the most corrosive settings found in municipal collection systems, sewers and industrial pretreatment applications. Effluents rich in sulfides are common in these humid and warm environments. When the heat and humidity is combined with long retention times, ideal conditions are created for microbiologically induced corrosion (MIC). This MIC can eventually destroy most sewer infrastructure but not FRP fiberglass manhole covers or FRP manholes. This inherent corrosion resistance makes FRP fiberglass (FRP) manhole covers ideal for effluent manholes, outfalls, industrial pretreatment, industrial process, equalization tanks, holding tanks and basins.





7.) FRP fiberglass Manhole Lids Can Reduce Odors
FRP fiberglass covers and (FRP – fiber-reinforced polymer) manhole covers and frames are designed with odor control in mind. These FRP fiberglass manhole lids are manufactured with better sealing in mind which helps contain the odor. Plastic or FRP fiberglass manhole covers are also ideal for residential areas and urban environments sensitive to sewer odors. These FRP fiberglass manhole covers solve manhole issues for resorts, hotels, entertainment districts. Many engineers and facility managers have been using FRP fiberglass covers in parks and recreation areas, malls, outlet malls, high density developments, water parks, beaches, trailer parks, campgrounds and even all inclusive island resorts.

8.) FRP fiberglass Manhole Covers Are Ideal for Non Conductive Applications
Many Telco and electrical utility manhole applications require manhole lids and rings to be non conductive. FRP fiberglass manhole lids are well suited for these non-conductive manhole requirements. Manholes can also be fabricated and fitted with nonconductive fiberglass ladders, platforms and railings.




9.) FRP fiberglass Manhole Covers Allow AMR and Radio Signals to Pass Through
Traditional cast iron manholes can block or interfere with radio signal transmission. Different antennas, antenna extensions, special lids, adapters or cover drilling are sometimes required when using cast iron lids. FRP fiberglass manhole covers allow radio frequency signals from Automatic Meter Reading (AMR) systems and telemetry systems to pass through with little to no interference. This makes fiberglass reinforced plastic manhole covers and FRP fiberglass manhole covers an ideal fit for monitoring systems, AMR systems, sewer flow meters, telemetry, SCADA, sewer and manhole level transmitters, water quality monitoring, water samplers, wastewater samplers and other devices.

10.) FRP fiberglass Manhole Covers Reduce Operation Costs and Save Energy
Utilities are facing ever increasing operating costs. Higher fuel costs combined with higher vehicle acquisition and maintenance costs have managers looking for more creative ways to save the budget. Reduced manhole and cover maintenance helps:
• Reduces staff callouts while increasing time for family and the enjoying the benefits of recreation.
• Reduces fuel consumption and trips required to maintain the system.
• Saves on vehicle weight and fuel by not hauling around the heavier cast iron manhole lids. Three plastic manhole lids weigh less than one cast iron cover.
Quality FRP fiberglass manholes and covers typically last 30+ years or more. Cast iron manhole systems usually require significant maintenance or replacement costs during that same 3o year period of time.