Bolt On Puddle Flange & Bolt On Tank Flange Bolted Flange Joint | Supplier
Engineering buyers and procurement managers face these costly issues every day:
Leakage & Joint Failure
Poor-quality bolted flange joint gaskets cause 23% of unplanned downtime in process plants (industry benchmark).
Hidden Supply Chain Costs
Split shipments, delayed customs, and inconsistent quality add 18โ34% to total landed cost.
Non-Compliant Materials
Missing CE, ISO 9001, or material traceability documentation blocks project approval.
Long Lead Times
Standard suppliers quote 8โ12 weeks for custom bolt on tank flange orders โ we deliver in 4โ6 weeks.
๐ 73% of engineers say flange joint reliability is their #1 buying criterion โ don't compromise
Handan Boen Fastener Manufacturing Co., Ltd. (est. 2010) delivers precision bolted flange joint components that meet ASTM, DIN, and EN standards. Our factory-direct model eliminates markup, and our one-stop service from material selection to logistics tracking ensures you get exactly what you need โ on time.

CNC-machined mating surfaces ensure zero-leak bolted flange joint performance.
Material certifications (EN 10204 3.1) & batch trace codes on every bolt on puddle flange.
ISO 9001, CE, RoHS, and REACH โ ready for USA, Europe & SE Asia projects.
50,000+ pcs/month capacity โ rush orders for bolt on tank flange available.
| Parameter | Bolt On Puddle Flange | Bolt On Tank Flange |
|---|---|---|
| Material Grade | Carbon Steel S235 / S355, SS304/316 | Carbon Steel S355, SS316L, Duplex |
| Pressure Rating | PN 10 / PN 16 / Class 150 | PN 16 / PN 25 / Class 300 |
| Size Range | DN 50 โ DN 600 (2โณ โ 24โณ) | DN 80 โ DN 1200 (3โณ โ 48โณ) |
| Coating / Finish | Hot-dip galvanized, epoxy, or bare | Zinc-rich primer, 2-pack epoxy, or HDG |
| Standards | EN 1092-1, ASME B16.5 | EN 1092-1, ASME B16.47, API 605 |
๐ง Bolted flange joint assembly includes bolts, nuts, and gasket โ ask about our pre-assembled flange package.
Puddle flanges for concrete tank penetrations โ watertight bolted flange joint solutions.
High-pressure bolt on tank flange for crude, diesel & chemical storage tanks.
Modular bolted flange joint connections for refineries and food-grade plants.

+ 20 more global brands
RoHS ยท REACH ยท EN 10204 3.1"We switched our bolt on puddle flange supply to Boen Fastener โ 22% cost reduction, 100% on-time delivery, and full CE documentation. That's a supply chain win."
โ Procurement Manager, European Water Infrastructure Group

Q: What is a bolt on puddle flange used for?
A: It's used to create a watertight penetration through concrete walls/tanks โ the flange is bolted onto a cast-in puddle plate, forming a reliable bolted flange joint for pipe connections.
Q: Can you supply bolt on tank flange with custom drilling?
A: Yes โ we offer OEM/ODM drilling patterns per your PCD, number of holes, and gasket specification. Minimum order quantity: 50 pcs for custom patterns.
Q: What certifications do your bolted flange joints carry?
A: ISO 9001, CE (EN 1092-1), RoHS, REACH, and material traceability per EN 10204 3.1. We also provide FCC and UL upon request.
Q: What is the typical lead time for bolt on puddle flange orders?
A: Standard 4โ6 weeks from order confirmation. Express 3-week service available for volume orders (>500 pcs).
Q: Do you offer free samples for bolt on tank flange?
A: Yes โ we provide 2 free samples (freight collect) for qualified engineering evaluations. Request yours today.
Q: How do you ensure quality consistency for bolted flange joint assemblies?
A: 100% dimensional inspection, hardness test, and pressure test on each batch. We also provide a full inspection report with every shipment.
Q: What is the minimum order quantity for bolt on puddle flange?
A: 100 pcs for standard sizes (DN 50โDN 300). For larger sizes (DN 350+), MOQ is 50 pcs. Contact us for project-based pricing.
Thomas K. ยท Germany"The bolt on tank flange we ordered matched the DIN spec perfectly. Installation was smooth โ zero leaks. We've placed 3 repeat orders."
Maria L. ยท USA"We were skeptical about overseas supply, but Boen's quality control and communication changed our mind. Bolted flange joint assemblies arrived with full docs."
Ahmed R. ยท UAE"Fast delivery โ 5 weeks from order to Dubai. The bolt on puddle flange price was 18% lower than our previous supplier. Excellent value."
Sarah J. ยท UK"The OEM service for our custom bolt on tank flange was outstanding โ they even suggested a better material grade that saved us 12%."

David Chen
Senior Fastener Engineer & Export Specialist โ 14 years in industrial bolting solutions. David leads Boen's technical advisory team and has overseen 200+ flange joint projects across Europe, the Middle East, and the Americas.
โ๏ธ david.chen@fastenboen.com | ๐ www.fastenboen.com
Get factory-direct pricing, full compliance docs, and delivery in 4โ6 weeks.
๐ Free samples available ยท 100% quality guarantee ยท No minimum for first order.
๐ Hanguang Industrial Park, Yongnian District, Handan, Hebei, China ยท Daily 09:00โ17:00