Stainless Steel Round Flange Sight Glass Frame 304 Circular Tank Viewing Flange Base With Bolt Holes for Pressure Vessel Observation Window
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Product parameters
| Name | Round Flange Sight Glass |
| Serial Number | HG-YH-FLSC |
| Price | $35.00 |
| Mass/Weight | 1.86kg |
| Long(mm) | 60 |
| Wide(mm) | 60 |
| High(mm) | 24 |
| Main material | stainless steel |
| Color | silver |
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Product Details
Raw Material:
The whole Stainless Steel Sight Glass Base adopts integrated forging SS304 or SS316L stainless steel; all Sight Glass Flange Frame bodies go through full CNC precision milling, with smooth brushed metal surface.
Bolt Hole Structure:
Standard Round Tank View Port Flange is equipped with 6 evenly distributed bolt holes as shown in the picture; 4/8/12 bolt hole modes are available for customized Stainless Steel Sight Glass Base.
Size Range:
Standard Stainless Steel Sight Glass Base covers DN50 to DN250; outer diameter, flange thickness and bolt hole spacing of any Sight Glass Flange Frame can be adjusted for special Round Tank View Port Flange demands.
Inner Groove Design:
Every Sight Glass Flange Frame has a built-in stepped inner groove, which is exclusive structural detail of this Round Tank View Port Flange, used to fix the sight glass tightly without displacement.
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Core Product Functions
Fixing & Positioning Function:
The stepped groove of the Sight Glass Flange Frame clamps sight glass firmly, the Round Tank View Port Flange limits the glass horizontally and vertically, so the Stainless Steel Sight Glass Base prevents glass shaking under liquid pressure inside tanks.
Sealing & Anti-Leakage Function:
The ultra-flat machined surface of each Stainless Steel Sight Glass Base fits PTFE gaskets perfectly; the bolt locking structure of Sight Glass Flange Frame enables the Round Tank View Port Flange to block liquid, gas and steam leakage under medium pressure.
Observation Supporting Function:
The hollow middle area of Round Tank View Port Flange reserves complete visual space; the surrounding Stainless Steel Sight Glass Base and Sight Glass Flange Frame will not block sight, allowing operators to observe internal tank conditions in real time.
Quick Replacement Function:
When the sight glass is damaged, users only need to dismount the glass without removing the whole Stainless Steel Sight Glass Base; the split matching design of Sight Glass Flange Frame makes the Round Tank View Port Flange realize low-cost later maintenance.
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Competitive Product Advantages
Strong Corrosion Resistance
Stable Pressure Bearing Capacity
Universal International Standard Compatibility
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The stainless steel forging material of Stainless Steel Sight Glass Base resists acid, alkali, oil and steam erosion; long service life of Sight Glass Flange Frame, the Round Tank View Port Flange will not rust in wet chemical environments.
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Thickened integral flange body of every Round Tank View Port Flange improves compression resistance; CNC uniform force design of Stainless Steel Sight Glass Base ensures the Sight Glass Flange Frame will not deform after long-term bolt tightening.
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All sizes of Sight Glass Flange Frame match DIN, ANSI, JIS installation standards; the size system of Stainless Steel Sight Glass Base can replace most imported Round Tank View Port Flange on the market.
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Practical Application Scenarios
Chemical & Petrochemical Industry:
Anti-corrosion Stainless Steel Sight Glass Base, standard Sight Glass Flange Frame and high-pressure resistant Round Tank View Port Flange apply to chemical reactors, oil storage tanks, solvent mixing vessels, sewage treatment pressure vessels.
Pharmaceutical Industry:
Mirror polished non-dead-angle Sight Glass Flange Frame, matching Stainless Steel Sight Glass Base and Round Tank View Port Flange, are installed on pharmaceutical blending tanks and sterile storage tanks to meet clean production standards.
Water Treatment & Environmental Protection Industry:
Mass stock Stainless Steel Sight Glass Base, universal Sight Glass Flange Frame and economical Round Tank View Port Flange serve filter tanks, sedimentation tanks, water circulation pressure tanks.
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About Us
We have fully automated production lines and offer one-stop "design-operation-maintenance" full-cycle custom services, tailoring equipment to local working conditions. We provide flexible waterproof packaging and various transportation options to meet your logistics needs.
1.Advanced Manufacturing Factory Layout
Our production base is equipped with standardized large-scale industrial workshops, featuring a full set of high-end manufacturing equipment. The entire production process covers raw material shaping, precision machining, robotic welding, finished oil tank truck assembly, and offline testing, and also provides customized hardware products and exclusive service solutions to assist overseas clients in expanding their local businesses.

2.Authoritative Certifications & Long‑Term R&D Accumulation
Our enterprise boasts over 15 years of independent product R&D experience. Our R&D team holds numerous invention patents and utility model patents. The factory has passed mainstream internationally authoritative certifications including CE and ISO. Every batch of components undergoes standardized quality inspections complying with certification standards prior to shipment.

3.Core Competitive Edges
We operate a closed-loop "Design-Operation-Maintenance" service framework. The full lifecycle guidance covers pre-order solution consulting, production process progress tracking, and post-operational maintenance guidance. To meet customers' personalized needs, we conduct targeted product modifications and engineering optimization to support cross-border deployment.

We are a leading manufacturer of special trucks, tankers, trailers, and spare parts in China Welcome to visit us in Suizhou city, the production base of Chinese special purpose vehicles
T/T 30-50% as deposit, and the rest before delivery. We'll show you the photos of the products and packages before you pay the balance.
EXW, FOB, CFR, CIF, DAF, DDU.
Generally, it will take 20 to 30 days after receiving your advance payment. The specific deliver time depends on the items and the quantity of your order.
Yes. We have professional R&D team, we can produce the product exactly according to your requirements.
We are direct sales from the factory, so the price is very competitive. Different products have different prices. The price also depends on your special needs. To know the exact price, please contact us!
Yes, we have 100% test before delivery.
We provide lifelong tracking service and one year free warranty for all of our products.Meanwhile we provide free training and technical support to quide you repair your product. lf you need, we will also supply original spare parts and you just need to pay the freight