Straight Pipe Flange Adapter

Franta Straight Pipe Flange Adapter is a stainless steel flange fitting designed to connect straight pipe sections with flange-connected equipment, valves or pipeline interfaces. It is suitable for pump rooms, equipment areas, water supply systems and other project piping applications requiring pipe-to-flange transition.

Material: 304,316L
Standard: EN10312
Connection Type: Flanged
Fitting Category: Straight Pipe Flange Adapter

Multiple materials available

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Product Description
Product Specifications
Manufacturing Process
Quality Inspection
Packaging and Delivery

Product Introduction
Franta Straight Pipe Flange Adapter is a stainless steel flange fitting designed to connect straight pipe sections with flange-connected equipment, valves or other pipeline interfaces. It provides a practical transition solution where straight stainless steel piping meets a flange connection point.
According to the latest domestic product catalog, pipe matching for this product is based on the GB Series I outside diameter system. Final flange standard, pressure rating and interface requirements should be confirmed according to project specifications.
As part of the Franta stainless steel piping system, the Straight Pipe Flange Adapter can be matched with stainless steel tubes, flange fittings, valves and other compatible piping components for project-based system supply.
Product Features
1. Straight Pipe-to-Flange Transition
Designed to connect straight stainless steel pipe sections with flange-connected valves, equipment or pipeline interfaces.
2. Stainless Steel Construction
Stainless steel construction supports corrosion resistance and durable performance for building water supply and engineering piping applications.
3. GB Series I Pipe Matching
Pipe outside diameter selection follows the GB Series I size system according to the latest domestic product catalog.
4. Equipment and Valve Connection
Suitable for pump rooms, mechanical rooms and equipment areas where straight pipelines need to connect with flange-mounted components.
5. Straight Pipeline Integration
The extended straight pipe section provides a practical interface for integrating flange connections into straight piping layouts.
6. System Compatibility
Can be coordinated with Franta stainless steel tubes, flange fittings, valves, grooved fittings and other pipe accessories for complete system matching.
Application Scenarios
Straight Pipeline Sections
Suitable for straight pipe runs requiring transition to flange-connected valves, equipment or other pipeline interfaces.
Pump Rooms and Equipment Rooms
Applicable to pump rooms, mechanical rooms and equipment areas where stainless steel pipe sections need flange transition connections.
Commercial Buildings
Can be used in hotels, office buildings, apartments and commercial complexes with equipment-side flange interfaces.
Public Facilities
Suitable for hospitals, schools, stations and other public building piping systems requiring straight pipe-to-flange transitions.
Water Utility Systems
Applicable to water supply stations, secondary water supply and distribution piping where flange-connected equipment or valves are used.
Connection and System Compatibility
Franta Straight Pipe Flange Adapter should be selected according to the corresponding GB Series I pipe outside diameter, flange interface requirement, material, pressure requirement, installation environment and project design.
The product can be supplied together with Franta Stainless Steel Tube, flange fittings, valves and other compatible components for coordinated stainless steel piping system supply.
FAQ
Q1. What is a Straight Pipe Flange Adapter used for?
It is used to connect straight stainless steel pipe sections with flange-connected equipment, valves or pipeline interfaces.
Q2. Which pipe size system is used?
According to the latest domestic catalog, this product uses the GB Series I pipe outside diameter system.
Q3. What sizes are available?
The domestic catalog lists DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80 and DN100.
Q4. Is it suitable for pump rooms?
Yes. It is suitable for pump rooms and equipment areas where straight stainless steel piping needs to connect with flange-mounted components.
Q5. What flange standard and pressure rating are used?
The provided size catalog does not specify a flange standard or pressure rating. These should be confirmed according to the project specification and official product data.
Q6. What information should be provided for quotation?
Please provide the required DN, pipe outside diameter, material, quantity, flange interface requirement, pressure requirement and project application.
DN Pipe OD - GB Series I (mm)
15 16
20 20
25 25.4
32 32
40 40
50 50.8
65 76.1
80 88.9
100 101.6
Zhejiang Franta Co., Ltd. has established a standardized production and quality management system. According to the structure, material, and application requirements of different products, the company implements comprehensive process control covering raw materials, forming and machining, welding, heat treatment, surface treatment, cleaning, inspection, and packaging to ensure consistent product quality and meet the requirements of building water supply and drainage systems, domestic water supply, and related engineering applications.
Process Flow Reference
Process Description
Franta develops corresponding manufacturing processes and inspection requirements for different product categories, with standardized control over materials, dimensional accuracy, processing quality, surface condition, and finished product performance. For products subject to specific process requirements, processes such as gas-shielded welding, solution heat treatment, pickling and passivation, and ultrasonic cleaning are applied to further improve product stability, corrosion resistance, and surface cleanliness.
Franta has established a quality inspection system covering raw materials, production processes, and finished products. According to the structure and application requirements of different products, the company conducts appropriate inspections of material, dimensions, appearance, key performance, and finished product condition to ensure that products meet relevant product standards and internal quality control requirements before shipment.
Common Quality Control Items
Material Inspection
Inspection and verification of raw material composition and related material properties.
Dimensional Accuracy Inspection
Inspection of key product dimensions, specifications, and processing accuracy.
Surface Quality Inspection
Inspection of surface condition, cleanliness, and overall appearance quality.
Structural and Processing Quality Inspection
Inspection of forming, welding, connections, and other critical structural areas.
Performance Testing
Depending on product requirements, relevant tests may include sealing, pressure resistance, connection performance, and other applicable performance tests.
Finished Product and Pre-Shipment Inspection
After production is completed, products undergo sampling and pre-shipment inspection, including verification of specifications, quantities, identification marks, and finished product condition.
Quality Control Value
Through comprehensive quality control from raw materials to finished product shipment, Franta continuously improves product consistency and stability, providing a reliable product foundation for residential, commercial, public building, municipal water supply, and industrial applications.
Zhejiang Franta Co., Ltd. uses standardized packaging methods according to the specifications, quantity, transportation distance, and project requirements of engineering pipes, helping reduce the risk of wear, impact, and scratches during transportation and ensuring that products are safely delivered to warehouses, project sites, or designated locations.
Common Packaging Methods
Protective Plastic Film Packaging
Woven Bag Packaging
Bundled Packaging
Steel Strap Binding
Pallet Packaging
Wooden Frame or Wooden Crate Packaging
Customized Labels or Project Shipping Marks
Shipping Information
Engineering orders can be arranged for shipment according to the project delivery schedule, specification list, phased delivery requirements, and on-site receiving conditions. For quotation or order placement, it is recommended to provide the project name, application scenario, material, size range, quantity, delivery location, and whether matching fittings, valves, or other accessories are required.

DN	Pipe OD - GB Series I (mm)
15	16
20	20
25	25.4
32	32
40	40
50	50.8
65	76.1
80	88.9
100	101.6

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Frequently Asked Questions

How Can I Request Franta Product Samples, Technical Documents, Product Selection Support, or a Project Quotation?

You can obtain relevant product information through the Franta website, download center, or contact channels. For projects requiring further product selection support or a quotation, please provide details such as the product name, specifications, quantity, application, and basic project information. Based on your actual requirements, Franta’s sales or technical team can provide product documentation, selection recommendations, sample support, and quotation solutions.

Does Franta Support Bulk Project Supply and Complete Stainless Steel Piping System Solutions?

Yes. Franta offers a comprehensive product range that includes stainless steel pipes, press-fit fittings, grooved fittings, flanged fittings, valves, manifolds, O-ring seals, pipe supports, fasteners, and installation tools. Based on project requirements, Franta can provide systematic product selection and coordinated supply of piping system components, helping reduce compatibility issues between different products and streamline the procurement process.

What Information Is Required to Request a Quotation for an Engineering Project?

To improve product selection and quotation efficiency, please provide information such as the project type, conveyed medium, required material grade, pipe size or specification, connection method, quantity, project location, and any special operating conditions. If design drawings, material lists, or technical specifications are available, they can also be provided. Franta can use this information to recommend suitable products and prepare an accurate quotation.

Does Franta Offer OEM and ODM Services for Stainless Steel Water Tanks?

Yes. Franta provides OEM and ODM services for stainless steel water tanks. Based on project and market requirements, we can discuss customization options for tank dimensions, structural design, surface treatment, accessories, and packaging. OEM and ODM solutions are developed according to the specific requirements and conditions of each order.

What Materials and Manufacturing Processes Are Used for Franta Stainless Steel Water Tanks?

Franta stainless steel water tanks are primarily made from high-quality stainless steel materials. Depending on the product design, manufacturing processes may include forming, welding, and surface treatment. Throughout production, quality control is carried out at key stages such as incoming material inspection, forming, welding, and surface finishing to meet different requirements for tank structure, dimensions, and surface appearance.

What Inspections and Tests Are Required After Installing a Stainless Steel Piping System?

After installation, the pipes, fittings, insertion depth, pressed joints, and pipe supports should be inspected to ensure they have been installed correctly. Pressure testing or other leak-tightness tests should then be carried out in accordance with the applicable project specifications. For concealed piping, the system should be fully inspected and accepted before walls or ceilings are closed or subsequent finishing work begins, ensuring that all requirements are met before proceeding to the next stage of construction.

Which Applications Are EPDM, FKM, and HNBR O-Rings Best Suited For?

Different O-ring materials offer different levels of temperature resistance, chemical compatibility, and aging resistance. EPDM is commonly used in water supply and conventional hot water systems, while FKM is better suited to higher-temperature conditions and certain special media. HNBR can be selected for specific industrial media and operating conditions. For each project, the sealing material should be chosen based on the conveyed medium, operating temperature, system pressure, and technical requirements rather than by color alone.

How Are Press-Fit Stainless Steel Pipe Connections Sealed, and Are They Reliable?

Press-fit stainless steel pipe connections rely on the pipe, fitting socket, O-ring seal, and a dedicated press tool working together to create a secure joint. During installation, the pipe is inserted into the fitting to the specified depth, and the fitting socket is then mechanically pressed with the proper tool. This creates a stable connection between the pipe, fitting, and sealing ring. The reliability of the connection depends on both the precision of the piping components and correct installation in accordance with the specified procedures.

What Is the Franta Active Water System, and How Is It Different from a Traditional Home Water Supply System?

The Franta Active Water System uses looped piping design and dynamic circulation components to keep water moving and refreshed within the piping system, helping reduce long-term water stagnation in certain pipe sections. Unlike traditional home water supply systems that primarily focus on delivering water from one point to another, the Active Water System places greater emphasis on continuous water movement, circulation management, and the overall household water-use experience.