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Engineered to withstand the demanding ambient extremes, high operating pressures, and corrosive chemical environments typical of industrial operations in Basra, Karbala, and Baiji.
Bridging operational safety, high-temperature thermal durability, and automated optical surveillance across Iraq's energy backbone.
Iraq represents one of the most resource-dense and rapidly rehabilitating industrial sectors in the Middle East. With major energy megaprojects centered in the Basra oilfields, Zubair, Rumaila, the Karbala Modern Refinery, and the upgraded Baiji Refining Complex, there is an urgent and critical requirement for high-reliability process monitoring instrumentation.
In standard processing facilities, conventional borosilicate glass or soda-lime viewing ports frequently fail under rapid pressure surges, sour gas corrosion (high H2S content), and the extreme temperature swings common to Iraq's desert climate—where ambient summer heat tops 52°C while process piping operates upwards of 800°C to 1100°C.
Beyond traditional crude distillation, the rapid modernization of Iraq's fertilizer manufacturing complexes in Khor Al-Zubair, combined-cycle gas turbine (CCGT) power plants in Baghdad, and wastewater treatment infrastructure has accelerated the adoption of custom-machined circular quartz discs, level gauge reflex sight glasses, and fused silica tubular sight flow indicators.
Completely impervious to high-concentration hydrogen sulfide (H2S), sulfur dioxide, nitric acid, and chlorine vapors encountered in southern Iraqi oilfields.
Continuous service at 1100°C and short-term resistance up to 1300°C, offering 10x the thermal endurance of standard industrial tempered glasses.
Your premier global manufacturing partner and trusted supplier of quartz consumables and sight glass solutions for Iraq's critical industrial infrastructure.
Donghai County Leef Quartz Technology Co., Ltd. was founded in 2022 as a dedicated foreign trade and precision processing subsidiary of Lianyungang Southeast Quartz Products Co., Ltd., which was established in 2015. We are strategically situated in Donghai County, Lianyungang City, Jiangsu Province — celebrated internationally as "China Crystal Capital" and recognized as a national-level silicon material industry base.
Blessed with superior high-purity quartz ore resources, Donghai serves as the core production epicenter of quartz raw materials in China. Relying on local high-grade quartz veins, we specialize in the deep processing of high-purity quartz glass, functioning as a fully integrated enterprise uniting research and development, optical design, advanced manufacturing, strict quality verification, and international supply chain distribution.
With mature production technology, rigorous multi-stage quality control, and complete customized engineering services, we have become a reliable supplier of quartz consumables for industries including photovoltaics, semiconductors, industrial laboratories, chemical engineering, power generation, and advanced lighting systems worldwide.
We operate standardized production workshops equipped with a comprehensive set of advanced equipment for quartz cutting, CNC circular edge chamfering, double-sided optical grinding, fire-polishing, and high-temperature vacuum annealing forming, establishing a robust end-to-end production line from quartz ingot processing to finished optical sight glass inspection.
Backed by a professional production management team with over 10 years of industry experience, we specialize in process optimization and customized manufacturing. We support rapid prototyping and mass production for various complex sight glasses, sight flow indicators, and custom reactor components, with an annual capacity of hundreds of thousands of pieces.
We accept both small-batch custom engineering orders for Iraq refinery overhauls and large-scale bulk orders for EPC contractors with efficient dispatch cycles. By continuously upgrading production techniques, we maximize product dimensional precision and thermal stability, delivering dependable, cost-effective quartz solutions for global clients.
From Basra crude processing trains to northern petrochemical pipelines, discover where our quartz sight products deliver uncompromised visual clarity and process security.
Installed on crude vacuum towers, hydrocracker columns, and flare flame monitoring cameras in Basra and Karbala refineries to continuously observe combustion status, internal boiling dynamics, and phase separation under extreme thermal gradients.
Critical for ammonia synthesis units, urea production vessels, and sulfur recovery units (SRU) across Khor Al-Zubair chemical hubs, providing complete inertness against acidic gas mixtures and high-pressure steam purging.
High-pressure fused quartz transparent level gauge glasses installed on superheated steam boiler drums and turbine lubrication circuits in major power plants in Baghdad and Al-Khairat to prevent water-starvation blowouts.
Quartz sight flow indicators mounted on reverse osmosis (RO) desalination skids and high-salinity brine evaporation towers along the Shatt al-Arab waterway, ensuring 100% resistance to chloride pitting and fouling.
Modern Iraqi smart refineries deploy infrared thermal imaging and AI flame recognition sensors. Our ultra-pure fused quartz sight discs provide ultra-wide 190nm–3500nm UV-to-NIR spectral transmission for accurate non-contact telemetry.
Supplying the Ministry of Oil analytical centers, University of Baghdad, and Basrah Oil Company research labs with custom quartz reaction flasks, distillation columns, and spectroscopic cuvettes.
All products are engineered from high-purity fused quartz raw materials, featuring extreme heat resistance (up to 1200°C), thermal shock resistance, corrosion resistance, high light transmittance, and high electrical insulation.
| Technical Property | Fused Quartz Sight Glass Specification | Standard Borosilicate Glass (Comparison) |
|---|---|---|
| Purity (SiO2 Content) | ≥ 99.99% Ultra-High Purity | Approx. 80% - 81% |
| Max Continuous Working Temp | 1100°C – 1200°C | 280°C – 300°C |
| Thermal Shock Resistance (ΔT) | 1100°C direct drop to 20°C water (No Cracking) | Approx. 150°C – 180°C max |
| Coefficient of Thermal Expansion | 5.5 × 10-7 / °C (20°C – 320°C) | 3.3 × 10-6 / °C |
| Spectral Transmission Range | 190 nm – 3500 nm (Deep UV to Mid Infrared) | 350 nm – 2200 nm (Visible only) |
| Hydrostatic Pressure Resistance | Up to 25.0 MPa (dependent on disc diameter/thickness ratio) | Up to 4.0 – 6.0 MPa |
| Acid Resistance Rating | Class 1 / Extreme (Resistant to H2S, HNO3, H2SO4, HCl) | Moderate (Degrades under hot acid vapor) |
| Surface Finish & Flatness | Optical Polish 80/50, 60/40, Flatness λ/2 to λ/4 per inch | Standard commercial polish |
Ensuring zero-breakage transit and expedited customs compliance for major Iraqi ports and industrial zones.
Direct consolidated sea freight to Port of Umm Qasr (Basra) and express air freight to Baghdad International Airport (BGW) and Erbil International Airport (EBL) with DDP/FOB/CIF terms.
Every quartz sight glass disc and tube is individually sealed in dust-free electrostatic film, vacuum-cushioned in multi-layered high-density EPE pearl foam, and crated in fumigated solid plywood wooden boxes.
Full Mill Test Certificates (MTC EN 10204 3.1), raw material purity analysis reports, pressure test verification logs, and Certificate of Origin (CO) legalized for Iraqi customs clearance.
Browse our complete standard and custom-manufactured fused silica quartz series engineered for high-temperature and extreme pressure applications in the Iraqi industrial market.
Whether you are an EPC engineering contractor renovating refinery units in Basra, a chemical plant maintenance manager in Baiji, or an industrial instrumentation distributor in Baghdad, Donghai County Leef Quartz Technology Co., Ltd. provides rapid CAD drawing customization, factory direct wholesale pricing, and reliable logistics support.
