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About pip install flask
Where to Find Flask Suppliers?
China hosts a diversified network of flask manufacturers, with key production clusters in Tianjin, Guangzhou, and Sichuan provinces. These regions support specialized industrial ecosystems for laboratory glassware and scientific equipment. Tianjin and Guangzhou are recognized for advanced borosilicate glass processing, leveraging high-temperature molding and precision annealing techniques to ensure thermal shock resistance. Sichuan-based suppliers focus on polymer-based lab flasks, including polycarbonate (PC) and PETG materials, commonly used in cell culture and bioreactor applications.
The geographic concentration enables streamlined access to raw materials, skilled labor, and export logistics. Suppliers in these hubs benefit from vertically integrated operations—ranging from mold design to packaging—which reduce lead times and improve cost efficiency. Buyers can expect MOQs as low as 1 piece for standard models, with bulk pricing available from 5–48 units depending on material and complexity. Lead times typically range from 7–15 days for stock items, with customization adding 10–20 days.
How to Choose Flask Suppliers?
Effective supplier selection requires rigorous evaluation across technical, operational, and transactional dimensions:
Material & Design Compliance
Verify the use of grade-appropriate materials: borosilicate glass 3.3 for high-temperature applications, PC/PETG for shatter-resistant biological testing, and vacuum-rated glass for distillation setups. Confirm dimensional accuracy, especially for standardized joint sizes (e.g., 14/23, 19/26), to ensure compatibility with existing lab systems.
Production Capability Assessment
Evaluate supplier infrastructure based on the following indicators:
- Minimum 100+ product listings in lab consumables or chemistry equipment categories
- Demonstrated specialization in flasks or related reactor vessels
- In-house quality control protocols for leak testing, pressure tolerance, and optical clarity
- On-time delivery performance exceeding 90%
Cross-reference response time (ideally ≤5 hours) and reorder rates as proxies for service reliability and customer satisfaction.
Transaction Risk Mitigation
Prioritize suppliers with verifiable online transaction histories and transparent revenue reporting. Utilize secure payment mechanisms that align with international trade standards. For custom designs, request prototypes or CAD drawings before full-scale production. Conduct pre-shipment inspections to validate product conformity, particularly for large-volume orders.
What Are the Best Flask Suppliers?
| Company Name | Location | Main Products (Listings) | On-Time Delivery | Response Time | Reorder Rate | Online Revenue | Min. Order | Price Range (USD) |
|---|---|---|---|---|---|---|---|---|
| Tianjin Chengsheng Glass Instrument Sales Co., Ltd. | Tianjin, CN | Flasks (144), Other Lab Supplies (375) | 92% | ≤5h | 24% | $10,000+ | 1 pack / 1–5 pcs | $1.50–207 |
| Beijing Mengxing Electronic Technology Co., Ltd. | Beijing, CN | No primary flask specialization | 100% | ≤4h | 18% | $430,000+ | 5 pcs | $1.94–60.34 |
| Guangzhou Reacware Co., Ltd. | Guangzhou, CN | Chemistry (20), Other Lab Supplies (118) | 100% | ≤2h | 50% | $3,000+ | 1 pc | $4.86–1,250 |
| Sichuan Shengshi Hengyang Technology Co., Ltd. | Sichuan, CN | Flasks (33), Other Lab Supplies (287) | 90% | ≤7h | 20% | $70,000+ | 24–48 pcs/sets | $1.68–6.20 |
| Shaanxi Ansen Medical Technology Development Co., Ltd. | Shaanxi, CN | Pipe Fittings (164), Seals (172) | 100% | ≤11h | Not Available | Not Available | 100–500 bags | $1.20–11.60 |
Performance Analysis
Guangzhou Reacware stands out with a 50% reorder rate and sub-2-hour response time, indicating strong customer retention and operational responsiveness. The company specializes in reactor-grade flasks with hose connections and vacuum-sealed configurations, suitable for chemical synthesis environments. Tianjin Chengsheng offers broad inventory depth in glassware and supports low MOQs down to one piece, ideal for R&D labs and small-scale procurement. Sichuan Shengshi Hengyang provides competitively priced conical and baffled Erlenmeyer flasks in bulk sets, catering to biotech and medical research sectors. Beijing Mengxing lists flask-related products but lacks domain specialization, suggesting potential intermediation rather than direct manufacturing. Shaanxi Ansen appears misaligned with flask demand, primarily serving plumbing and medical repair markets.
FAQs
How to verify flask supplier reliability?
Assess consistency between product specifications and actual offerings. Request documentation on material sourcing, such as borosilicate glass certification or polymer safety data sheets (SDS). Analyze supplier tags for delivery performance, reorder metrics, and response speed. Direct communication should confirm technical understanding of flask types, tolerances, and application requirements.
What is the typical minimum order quantity for lab flasks?
MOQ varies by material and supplier. Glass flasks are often available from 1–5 pieces, while plastic or bulk-packed items require 24–48 units per order. Some suppliers offer mixed batches for initial sampling. Confirm packaging formats—individual units, sets, or sterilized packs—prior to ordering.
Can flask suppliers accommodate customization?
Limited customization is feasible, including volume markings, special joint sizes, or coating applications. Suppliers like Beijing Mengxing indicate logo customization options, though structural modifications may require engineering validation. Full OEM development is uncommon among listed vendors; buyers seeking extensive redesign should engage manufacturers with dedicated R&D teams.
Are there differences in flask pricing by material type?
Yes. Borosilicate glass flasks range from $2.90–$6.99 for standard models, with high-vacuum or multi-neck variants exceeding $200. Plastic flasks (PC/PETG) are priced between $1.68–$6.20 per unit, reflecting lower material and molding costs. Bulk discounts apply at tiered volumes, particularly for uniform configurations.
Do suppliers support global shipping?
Most suppliers listed have international transaction experience, evidenced by U.S. dollar pricing and multi-region buyer bases. Confirm packaging standards for fragile glass items and clarify Incoterms (e.g., FOB, CIF) during negotiation. Air freight is recommended for samples; sea freight is cost-effective for container loads of non-hazardous labware.
