Description

Stainless Press Flange Adapter

Merit Stainless Press Flange Adapters are designed to transition compatible stainless steel press piping to a flanged connection. The adapter provides a press connection on the pipe side and a fixed flange connection on the opposite end for joining valves, pumps, equipment, and other flanged components.

Merit Stainless Steel Press Fittings are designed for use with Schedule 5 or Schedule 10 Type 304/304L or 316/316L stainless steel pipe conforming to ASTM A-312. The stated working pressure range is from full vacuum to 300 PSI (20.7 bar) on Schedule 5 and Schedule 10 stainless steel pipe.

Product Highlights

Stainless steel press flange adapter
Press x flange connection configuration
Transitions stainless press piping to a bolted flange connection
Fixed flange arrangement
Designed for Schedule 5 and Schedule 10 stainless steel pipe
Compatible with Type 304/304L stainless steel pipe
Compatible with Type 316/316L stainless steel pipe
Designed for ASTM A-312 stainless steel pipe
Working pressure range from full vacuum to 300 PSI
Maximum stated working pressure: 300 PSI / 20.7 bar
Useful for valves, pumps, equipment, and other flanged connections
Manufacturer approvals, dimensional information, tooling guidance, and compatibility documentation available below

Technical Specifications

Product Type	Press Flange Adapter
Material	Stainless Steel
Connection Configuration	Press x Flange
Press Connection	Stainless Press
Flange Connection	Bolted Flange
Flange Style	Fixed
Compatible Pipe Material	304/304L or 316/316L Stainless Steel
Compatible Pipe Schedule	Schedule 5 or Schedule 10
Pipe Standard	ASTM A-312
Working Pressure Range	Full Vacuum to 300 PSI
Maximum Working Pressure	300 PSI / 20.7 bar
Primary Function	Transitioning Stainless Press Piping to a Flanged Connection

Flange Adapter Design

A stainless press flange adapter provides a press connection on the piping side and a flange connection on the opposite end.

The press end connects to compatible Schedule 5 or Schedule 10 stainless steel pipe using approved Merit Stainless Press tooling. The flange end connects to a compatible mating flange using the appropriate gasket, bolting, and flange installation procedure.

This configuration provides a direct transition from stainless press piping to flanged valves, pumps, equipment, and other system components.

Why Choose a Press Flange Adapter?

Press-to-Flange Transition

Connects stainless press piping to flanged components
Useful for valves, pumps, and equipment
Provides a serviceable bolted flange connection
Combines press and flange connection methods
Can reduce the need for additional transition fittings

Mechanical Press Installation

Uses compatible press tooling on the pipe side
No pipe threading required at the press connection
No fitting weld required at the press connection
Supports repeatable mechanical connections
Designed for compatible stainless steel piping systems

Fixed Flange vs. Van Stone Flange Adapter

Fixed Flange Adapter

Flange is fixed to the fitting body
Bolt-hole orientation must be considered during installation
Provides a direct press-to-flange transition
Suitable where fixed flange orientation is acceptable
This product configuration

Van Stone Flange Adapter

Uses a rotating flange arrangement
Allows bolt-hole alignment after pipe positioning
Useful where additional alignment flexibility is required
Provides the same general press-to-flange function
Different flange arrangement from this adapter

Compatible Stainless Steel Pipe

304 / 304L Stainless Steel

Compatible pipe material identified by Merit
Schedule 5 or Schedule 10 pipe
Pipe must conform to ASTM A-312
Verify pipe dimensions and condition before installation
Confirm chemical compatibility for the intended media

316 / 316L Stainless Steel

Compatible pipe material identified by Merit
Schedule 5 or Schedule 10 pipe
Pipe must conform to ASTM A-312
Suitable where the specified system requires 316/316L pipe
Confirm chemical compatibility for the intended media

Pressure Range

Merit states that its Stainless Steel Press Fittings have a working pressure range from full vacuum to 300 PSI (20.7 bar) when used on compatible Schedule 5 or Schedule 10 stainless steel pipe.

Final system suitability also depends on the selected flange class, mating flange, gasket, bolting, operating temperature, conveyed media, and other application requirements.

Common Applications

Commercial & Mechanical Piping

Valve connections
Pump connections
Mechanical equipment
Flanged piping transitions
Serviceable equipment connections

Industrial & Process Service

Process piping systems
Equipment nozzles
Flanged instrumentation assemblies
Compatible utility piping
Applications requiring press-to-flange transitions

Installation & Selection Guidance

Confirm the required nominal press and flange size before ordering.
Verify the required flange class and dimensional pattern.
Use only compatible Schedule 5 or Schedule 10 stainless steel pipe on the press connection.
Confirm pipe is Type 304/304L or 316/316L stainless steel as required.
Verify that the stainless steel pipe conforms to ASTM A-312.
Inspect and properly prepare the pipe end before installation.
Insert the pipe to the required depth before pressing.
Use compatible press tooling approved for the Merit Stainless Press system.
Align the fixed flange bolt pattern before completing installation.
Use the correct gasket for the mating flange, media, pressure, and temperature.
Use appropriate flange bolting and tighten according to applicable installation requirements.
Avoid using flange bolts to pull misaligned piping into position.
Support connected piping and equipment to prevent excessive load on the adapter.
Confirm system media compatibility using the Merit chemical compatibility chart.
Verify that the fitting, flange, gasket, and bolting are suitable for the intended service.

Product Documents

Merit Stainless Press Approvals

Review applicable approvals and certifications for the Merit Stainless Press fitting system.

View Stainless Press Approvals

Merit Stainless Press Benefits & Features

Review manufacturer information covering key benefits and features of the Stainless Press system.

View Benefits & Features

Merit Stainless Press Dimensional Catalog

Review fitting dimensions, available sizes, and product-specific dimensional information.

View Dimensional Catalog

Merit Stainless Press Chemical Compatibility Chart

Review chemical compatibility information before selecting fittings for the intended system media.

View Chemical Compatibility Chart

Merit Stainless Press FAQs

Review manufacturer answers to frequently asked questions about the Merit Stainless Press system.

View Stainless Press FAQs

Merit Stainless Press Handout

Review the manufacturer overview of the Stainless Press product line and system features.

View Stainless Press Handout

Merit Stainless Press Linecard

Review the available Merit Stainless Press product offering.

View Stainless Press Linecard

Merit Stainless Press Submittals

Review technical submittal information for the Merit Stainless Press fitting system.

View Stainless Press Submittals

Merit Stainless Press Tooling

Review compatible tooling information and pressing requirements before installation.

View Stainless Press Tooling

150# & 300# Flange Dimensional Specifications

Review dimensional information for applicable 150# and 300# flange patterns.

View Flange Specifications

Pipe Chart: Common Diameters & Wall Thicknesses

Reference common pipe diameters and wall thicknesses when reviewing Schedule 5 and Schedule 10 stainless steel pipe.

View Pipe Chart

Need Help Selecting a Stainless Press Flange Adapter?

Our industrial PVF specialists can help review your press size, flange size and class, stainless steel grade, pipe schedule, gasket requirements, working pressure, media compatibility, and tooling requirements before you order.

Email the GetPipe.com Team Visit Quick Support

Frequently Asked Questions

What is a stainless press flange adapter used for?

It is used to transition compatible stainless steel press piping to a bolted flange connection for valves, pumps, equipment, and other flanged components.

What type of connections does this adapter have?

The adapter has a stainless press connection on one end and a fixed flange connection on the other.

How is this different from a Van Stone flange adapter?

This adapter uses a fixed flange. A Van Stone flange adapter uses a rotating flange arrangement that allows bolt-hole alignment after pipe positioning.

What pipe is this adapter designed for?

Merit identifies the Stainless Press system for Schedule 5 or Schedule 10 Type 304/304L or 316/316L stainless steel pipe conforming to ASTM A-312.

What is the stated working pressure range?

The supplied Merit information states a working pressure range from full vacuum to 300 PSI (20.7 bar) on compatible Schedule 5 and Schedule 10 stainless steel pipe.

Does the press side require welding?

No. The press side is mechanically connected to compatible stainless steel pipe using appropriate Merit Stainless Press tooling.

Does the flange connection require a gasket?

A compatible gasket is generally required between mating flange faces and should be selected based on flange type, media, pressure, and temperature.

Where can I verify available adapter sizes?

Use the Merit Stainless Press Dimensional Catalog in the Product Documents section above.

Where can I verify flange dimensions?

Use the 150# & 300# Flange Dimensional Specifications document in the Product Documents section above.

Where can I check chemical compatibility?

Use the Merit Stainless Press Chemical Compatibility Chart in the Product Documents section above.

Where can I find compatible press tooling?

Use the Merit Stainless Press Tooling document in the Product Documents section above.

Important Ordering Notes

Product is a stainless steel press flange adapter.
Provides a press-to-flange transition.
Fixed flange configuration.
Designed for Schedule 5 or Schedule 10 stainless steel pipe.
Compatible pipe materials identified as 304/304L and 316/316L stainless steel.
Compatible pipe must conform to ASTM A-312.
Working pressure range is stated as full vacuum to 300 PSI / 20.7 bar.
Confirm nominal press size, flange size, and flange class before ordering.
Verify mating flange dimensions and bolt pattern.
Account for fixed flange orientation during installation.
Select the proper gasket and bolting for the intended application.
Confirm media compatibility using the manufacturer chemical compatibility chart.
Use compatible Merit Stainless Press tooling.
Review approvals, dimensional information, flange specifications, tooling requirements, and submittals before installation.