Import Boiler Sight Glass Window — Buy in wholesale FOB from Supplier in China
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Boiler Sight Glass Window
These are industrial boiler sight glass windows manufactured by Hengshui Aohong Technology Co., Ltd., designed for visual monitoring of water levels in steam and pressure vessels. Available in two primary types: reflex and flat, constructed from either borosilicate glass or tempered soda-lime glass. Dimensions range from 115 mm to 340 mm in length for flat types, and diameters from 30 mm to 350 mm for round types. All units are precision-ground and edge-polished for optical clarity and thermal shock resistance.
Borosilicate glass variants offer higher thermal stability and are preferred for temperatures above 180°C and pressures exceeding 10 bar. Tempered soda-lime glass is used for lower-pressure systems and is more cost-effective. Standard thickness ranges from 10 mm to 30 mm depending on size and pressure rating. Each window includes a compatible gasket set and is packaged in reinforced wooden crates with moisture-proof liners to prevent breakage during transit. The products comply with ASME Section VIII and DIN 28400 standards for pressure equipment components.
Buyers include boiler manufacturers, engineering contractors, and OEMs in power generation, chemical processing, and food production. Orders are typically placed in batches of 10 to 100 units, with custom sizes available upon request. Packaging is standardized for export, but labeling and certification documents can be provided upon request. Delivery lead times vary by order size and destination port.
| Glass type | Borosilicate Glass, Tempered Soda-Lime Glass |
| Reflex type dimensions | 115 x 34 mm, 140 x 34 mm, 165 x 34 mm, 190 x 34 mm, 218 x 34 mm, 250 x 34 mm, 280 x 34 mm, 320 x 34 mm, 340 x 34 mm (thickness 17 mm) |
| Round sight glass diameter | 30 mm to 350 mm |
| Round sight glass thickness | 10 mm to 30 mm |
| Glass tube outer diameter | 3 mm to 315 mm |
| Glass tube wall thickness | 1.0 mm to 10 mm |
| Typical glass tube length | 1000 mm to 1800 mm, standard for industrial use |
| Standard compliance | ASME Section VIII, DIN 28400 |
| Typical operating temperature range | -20°C to 280°C for borosilicate, -20°C to 180°C for tempered soda-lime |
| Typical pressure rating | Up to 25 bar for borosilicate, up to 16 bar for soda-lime, based on size and thickness |
Hengshui Aohong Technology Co., Ltd. is a manufacturer based in Hengshui, Hebei Province, China, specializing in sight glass, gauge glass, and related gaskets for industrial boilers and pressure vessels. The company exports to over 10 countries including the USA, UK, Poland, and Vietnam. The listing confirms product range and export activity but provides no details on factory size, workforce, certifications, or quality control systems beyond product specifications.
There is no mention of ISO certification, laboratory testing capability, or internal inspection protocols. The supplier does not state lead times, MOQs, or warranty terms. All information is derived from product descriptions and export history. Buyers must request formal documentation for compliance and quality assurance. The company’s role is limited to manufacturing and packaging; no installation or technical support is implied.
Boiler sight glass windows are essential inspection components used in industrial boilers, pressure vessels, and steam systems to enable visual monitoring of water levels and internal conditions. These windows are typically manufactured from tempered borosilicate or soda-lime glass for superior heat resistance and durability under high pressure. Widely exported for use in power generation plants, chemical processing, and manufacturing facilities, boiler sight glasses comply with ASME and DIN standards to ensure safe operation. Export packaging includes reinforced wooden crates with moisture-proof inner linings. As a critical safety component in boiler systems, sight glass windows are procured in bulk by industrial suppliers, engineering firms, and OEM manufacturers globally.
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Sourcing Boiler Sight Glass Window from Hengshui Aohong Technology Co., Ltd. - China Import Guide
Before ordering, confirm the exact glass type (borosilicate or soda-lime), thickness, and pressure rating match your boiler’s operating conditions. Request a certificate of conformity referencing ASME or DIN standards. Verify that the gasket material is suitable for your fluid and temperature. Inspect samples for surface flaws, edge chipping, and optical distortion before bulk purchase.
Logistics are handled via sea freight in reinforced wooden crates. Lead time is typically 15 to 30 days after order confirmation, depending on customization. Incoterms are usually FOB Tianjin or Shanghai port. Payment is typically 30% advance and 70% against shipping documents. Buyers must arrange import duties and local inspection compliance, as sight glasses may require pressure equipment certification upon entry.
Quality checks should include a visual inspection for scratches, bubbles, or internal stress marks under polarized light. Confirm gasket compatibility and flange alignment with the mounting flange. Retain batch numbers for traceability. For high-risk installations, request a pressure test report or non-destructive testing certificate. Always retain shipping documentation and supplier certificates for regulatory compliance.
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30 suppliersBuy Boiler Sight Glass Window in Bulk — Verified Supplier in China
When sourcing Boiler Sight Glass Window for your business, securing the right balance of quality and cost is essential. Hengshui Aohong Technology Co., Ltd., a verified supplier based in China, offers this product with key specifications including Tempered Borosilicate Glass / Heat-Resistant Soda-Lime Glass, Borosilicate (SiO2 ~80%, B2O3 ~12%) or Soda-Lime Glass with metal oxide stabilizers, and Standard DN20-DN80 (3/4" - 3"); thickness 3mm-10mm; custom sizes available. By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $3.15/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is actively traded under HS Code 7020.00, making it a staple in the Cupboards, Doors, Gates, Grills & Windows sector with strong demand from importing countries worldwide.
Boiler Sight Glass Window Specifications, Trade Terms & Pricing
Importing Boiler Sight Glass Window requires careful attention to shipping logistics, customs compliance, and secure payment terms. Hengshui Aohong Technology Co., Ltd. offers flexible shipping options such as Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. To ensure a smooth transaction, buyers should verify import duties for HS Code 7020.00 in their destination country. Common payment methods for international B2B transactions include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P). All transactions and RFQs are facilitated through EximNext, a leading global B2B marketplace designed to make cross-border trade secure and efficient.
About Hengshui Aohong Technology Co., Ltd. — Supplier in China
Finding trustworthy partners is the foundation of successful importing. The supplier of this Boiler Sight Glass Window has been verified on our platform. Whether you are a distributor, wholesaler, or procurement manager, you can request a free quotation, ask for product samples, and finalize your bulk purchase with confidence. EximNext hosts thousands of verified manufacturers and exporters across 200+ countries. Explore similar products in the Cupboards, Doors, Gates, Grills & Windows category and connect with top-tier exporters on our comprehensive import export marketplace. Start your sourcing journey today.
Import Boiler Sight Glass Window — Shipping, Logistics & Customs
Importing Boiler Sight Glass Window requires careful attention to shipping logistics, customs compliance, and secure payment terms. Common shipping options include Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Buyers should verify import duties for HS Code 7020.00 in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
Frequently Asked Questions About Boiler Sight Glass Window
What is the wholesale price of Boiler Sight Glass Window?
The current listed wholesale price for Boiler Sight Glass Window from Hengshui Aohong Technology Co., Ltd. is $3.15/Bags on FOB terms from China. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Hengshui Aohong Technology Co., Ltd. through EximNext.
What is the Minimum Order Quantity (MOQ) for Boiler Sight Glass Window?
The supplier, Hengshui Aohong Technology Co., Ltd., has set a Minimum Order Quantity (MOQ) of 1 Bags for Boiler Sight Glass Window. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
What is the HS Code for Boiler Sight Glass Window?
For international shipping and customs clearance, Boiler Sight Glass Window is classified under HS Code 7020.00. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
How can I import Boiler Sight Glass Window from China?
To import Boiler Sight Glass Window from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Hengshui Aohong Technology Co., Ltd.. Ensure you have the necessary import licenses for Cupboards, Doors, Gates, Grills & Windows products in your destination country.
Is Hengshui Aohong Technology Co., Ltd. a verified supplier?
Yes, Hengshui Aohong Technology Co., Ltd. is a verified supplier on EximNext. You can view their complete company profile, business registration details, certifications, and export history before placing a bulk order.
What are the key specifications of Boiler Sight Glass Window?
The key specifications for Boiler Sight Glass Window supplied by Hengshui Aohong Technology Co., Ltd. include Tempered Borosilicate Glass / Heat-Resistant Soda-Lime Glass, Borosilicate (SiO2 ~80%, B2O3 ~12%) or Soda-Lime Glass with metal oxide stabilizers, and Standard DN20-DN80 (3/4" - 3"); thickness 3mm-10mm; custom sizes available. For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to the supplier through EximNext.
What packaging options are available for bulk orders of Boiler Sight Glass Window?
Hengshui Aohong Technology Co., Ltd. offers Boiler Sight Glass Window with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Which countries import Boiler Sight Glass Window the most?
Boiler Sight Glass Window is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Hengshui Aohong Technology Co., Ltd. through our platform.
What certifications does this Boiler Sight Glass Window supplier hold?
Hengshui Aohong Technology Co., Ltd. maintains international quality certifications. These ensure that the Boiler Sight Glass Window meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for Boiler Sight Glass Window on EximNext?
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Hengshui Aohong Technology Co., Ltd. will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
What payment methods are accepted?
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services. Confirm accepted terms directly with Hengshui Aohong Technology Co., Ltd..
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