Can Threaded Flanges be reused after maintenance?

Yes, they can be unscrewed for line disassembly and reused after inspecting the thread profile for damage and re-applying thread tape or sealant.

Why are Threaded Flanges ideal for galvanized or cast iron pipes?

Welding galvanized steel creates toxic fumes and damages the protective zinc layer, while cast iron has poor weldability; threading provides a robust mechanical joint without those issues.

May I get a cheaper price?

A workable discount will be given if there's a large quantity.

Yes, please contact us for design details. we will offer you a reasonable price and make samples for you ASAP.

What's your quality guarantee?

We have our professional quality control workers with inspection machines. Or if you have a Chinese agency, you also can ask them to do an inspection in our factory before shipment.

Can I visit your factory before ordering?

Yes, you're warmly welcome to visit our factory.

Do you provide samples? Is it free or charged?

Yes, we can offer samples free but shipping charges are covered by customer mer.

Custom Forged Manufacturer 304 Stainless Threaded Flanges for Sewage Sampling Pipeline System

Name: Custom Forged Manufacturer 304 Stainless Threaded Flanges for Sewage Sampling Pipeline System
Brand: Jinan Hongtu Forging Co., Ltd
SKU: 2195273332

Shandong, ChinaJinan Hongtu Forging Co., Ltd

US$100.00

100-499 Pieces

US$60.00

500-999 Pieces

US$50.00

1,000+ Pieces

Sample price:US$100000.00/piece.Request sample

Product profile

Customization

Available

Standard

ANSI, DIN, GB, JIS

Type

Sw Flange

Model NO.

Flange

Material

Carbon Steel/Ss/Alloy Steel/Customized

Structure

Flanges

Connection

Screws

Sealing Surface

RF/FF/Customized

Manufacturing Way

Forging

Size Range

½" Nb to 24" Nb (DN15 to DN600)

Pressure Rating

Class150-2500/Customized

Thread Pitch

8-14 Tpi

Outer Diameter

90mm-2000mm/Customized

Inner Diameter

50mm-1500mm/Customized

Thread Bore Diameter

18 mm-600 mm/Customized

Hub Diameter at Base

30 mm-800 mm/Customized

Thickness of Flange

10mm-200mm/Customized

Number of Bolt Holes

4, 8, 12, 16, 20, 24 /Customized

Surface Finish (Facing)

Ra 3.2-6.3 μm/Customized

Non-Destructive Testing

Video Outgoing-Inspection

Provided

Machinery Test Report

Provided

OEM & ODM Custom

Sample

Transport Package

International Shipping Package

Specification

Customizable dimensions, volume, etc.

Trademark

OEM

Origin

Jinanchina

Production Capacity

500000 Pieces/Year

Key features

Equipped with advanced multi-axis CNC lathes and machining centers to achieve micron-level precision for sealing faces and inner diameters.

Manufactured from high-quality forgings with dense grain structure for superior strength.

Offers multiple sealing face options including Raised Face (RF), Flat Face (FF) to ensure leak-free integrity.

Threaded connections facilitate easy disassembly for regular cleaning and maintenance.

Perfectly solves joining challenges for materials with poor weldability, such as cast iron.

Non-Destructive Testing Pass: Tested for cracks and material defects using ultrasonic and magnetic particle testing.

We offer a complete one-stop solution covering raw material sourcing, forging, CNC machining, surface treatment, testing, and packaging.

Fully customizable flanges according to customer drawings or samples, catering to non-standard sizes and custom pressure ratings.

Professional export packaging including seaworthy wooden cases and protective end caps.

Rust-Inhibitive Protection: Standard black rust-proof oil or clear vanish coating extends shelf life.

Company profile

High Repeat Buyers ChoiceFast DeliveryRaw-Materials TraceabilityStandardized quality control

Jinan Hongtu Forging Co., Ltd

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 3 Years CertifiedNearest Port: Qingdao PortAverage Response Time: ≤0.54h

AI-Powered supplier vetting

SummaryThe supplier operates in metalworking and machinery-related manufacturing, including forging, machining, gear and transmission components, hardware products, and mechanical parts. It reports ISO9001:2015, ISO14001, and ISO45001:2018 certifications, raw-material traceability, 100% finished-product inspection, and four quality inspectors. The supplier offers broad customization and ODM services, has three R&D engineers, and launched new products during the past year. However, service-management procedures lack supporting records, and the supplier has no overseas warehouse, showroom, agents or branches, or offline trade-show participation. Financial information is only represented by years rather than substantive financial indicators, so financial credibility cannot be determined from the provided evidence. It reports OEM service for known brands but no Fortune 500 cooperation.

Supplier typeThe supplier is a manufacturing-oriented metalworking and machinery-parts provider, covering forging, machining, mechanical parts, hardware products, gears, reducers, and transmissions. Its description specifically presents end-to-end capability from forging raw materials to precision-finished parts, indicating an integrated industrial component supplier rather than a purely trading-focused business.

CertificationsThe supplier reports ISO9001:2015 quality management certification, ISO14001 environmental management certification, and ISO45001:2018 occupational health and safety certification. These are explicit certifications covering quality, environmental, and occupational safety management.

R&D capabilityThe supplier reports three R&D engineers, new products launched during the past year, ODM services, and multiple customization modes. However, it has no available SDK, which limits evidence of software-development or SDK-related innovation; overall product and design innovation capability is explicitly supported.

Production capacityProduction evidence includes lathes, machining centers, vertical lathes, and forging machines, with business coverage in forging, machining, gears, reducers, transmissions, hardware, and mechanical parts. The supplier also reports raw-material traceability and 100% finished-product inspection supported by four quality inspectors, indicating established manufacturing and quality-control capacity.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also reports ODM service availability, providing direct evidence of broad product-development and customization support.

Product Q&A

Q:What are the main advantages of using a Threaded Flange?

The primary advantage is that no welding is required, making installation fast and safe in environments where open flames are strictly forbidden or welding equipment is unavailable.

Q:When should you avoid using Threaded Flanges?

They should be avoided in high-pressure, high-temperature, or severe cyclic loading applications, as thermal expansion and line vibrations can cause the threaded joint to loosen and leak.

Q:Can a Threaded Flange be seal-welded?

Yes, in some low-to-medium pressure systems, a small seal weld can be applied around the pipe and flange junction after threading to prevent potential leaks.

Q:How do Threaded Flanges compare to Socket Weld Flanges?

Both are used for small-bore piping, but Socket Weld flanges require a fillet weld on the outside for a permanent, stronger seal, whereas Threaded flanges rely entirely on mechanical thread engagement.

Q:How do you ensure a leak-tight seal on a Threaded Flange?

Applying suitable thread sealants, such as PTFE tape or pipe dope, before screwing the flange onto the pipe helps lubricate threads during tightening and seals microscopic leak paths.