Hitachi Malleable Iron Threaded Pipe Fittings

Hitachi Metals offers a comprehensive range of Gourd Brand malleable iron threaded pipe fittings for fire-protection, water, air, gas, steam, oil and mechanical piping systems.

This page combines all products supplied in the Hitachi catalogue into one complete product-range page because the manufacturer issued one catalogue covering the full Gourd Brand Malleable Iron Pipe Fittings family.

The product range includes elbows, tees, crosses, sockets, couplings, reducing fittings, male and female threaded fittings and multiple connection accessories.

Product Overview:

The catalogue identifies the products as Gourd Brand Malleable Iron Pipe Fittings manufactured from black-heart malleable iron.

The material is presented as having a uniform metallic structure, suitable tensile strength and elongation for threaded piping applications when correctly selected and installed.

Main Product Families:

Elbows:

The range includes:

• 90° Equal Plain Elbows.
• 90° Equal Banded Elbows.
• 90° Reducing Elbows.
• 45° Elbows.
• Street Elbows.
• Equal and reducing configurations.

Elbows are used to change piping direction and are available in multiple sizes and thread configurations.

Tees:

The range includes:

• Equal Tees.
• Reducing Tees.
• Side Outlet Tees.
• Multi-size threaded tees.

Tees create additional branches from the main piping line and are available in equal and reducing arrangements.

Crosses:

Four-way cross fittings are available for creating multiple branches from one piping point.

Equal and reducing size configurations are shown in the product tables.

Sockets and Couplings:

The catalogue includes:

• Plain Sockets.
• Banded Sockets.
• Full Parallel Thread Sockets.
• Ribbed Sockets.
• Right-Hand and Left-Hand Thread Sockets.

Sockets and couplings connect two threaded pipe ends in a straight line.

Selected types are available with full parallel threads, external reinforcing bands or right-hand and left-hand threads for special installation requirements.

Reducing Fittings:

The range includes:

• Reducing Elbows.
• Reducing Tees.
• Reducing Sockets.
• Multi-outlet fittings with different nominal sizes.

Reducing fittings allow transitions between larger and smaller pipe sizes.

Male and Female Thread Configurations:

The range includes fittings with:

• Female threads.
• Male threads.
• Taper threads.
• Parallel threads.

These configurations allow connection to pipes, valves, equipment and accessories with different threaded ends.

Available Thread Standards:

The catalogue states that Hitachi fittings can be supplied with:

• British pipe threads.
• American pipe threads.
• German pipe threads.

Referenced standards include:

• JIS B 2301.
• B.S. No. 21.
• ANSI B1.20.1.
• DIN 2999.

Fittings may be supplied with taper or parallel threads according to product type and customer requirements.

Accurate thread machining and chamfered fitting ends help provide easier engagement and reduce the risk of thread damage during assembly.

Material:

The fittings are manufactured from:

• Black Heart Malleable Iron.

The catalogue compares the material properties with Japanese, British and American standards and shows tensile strength and elongation characteristics suitable for pipe-fitting applications.

Available Finishes:

The products can be ordered as:

• Black.
• Galvanized.

Black Fittings:

Uncoated black fittings for applications where this finish is suitable for the system fluid and installation environment.

Galvanized Fittings:

Hot-dip galvanized fittings for improved corrosion resistance.

The catalogue states that the fittings are dipped in molten zinc before threading and that special melting, annealing and galvanizing processes are used to improve coating performance.

Pressure and Temperature Ratings:

The catalogue shows applications involving:

• Steam.
• Air.
• Water.
• Gas.
• Oil.
• Other suitable fluids.

Ratings shown include:

Steam, air, gas and oil below 300°C:

• Maximum working pressure: approximately 150 PSI.

Steam, air, gas, oil and water below 200°C:

• Maximum working pressure: approximately 200 PSI.

Non-shock water below 120°C:

• Maximum working pressure: approximately 300 PSI.

The final allowable pressure depends on fluid, temperature, fitting type, size and thread configuration.

Available Sizes:

The catalogue shows a wide range of nominal sizes for different fitting types.

General thread tables include nominal sizes ranging approximately from:

• 1/8 inch.
• Up to 10 inches for selected thread and body data.

Not every fitting is available in every size. Refer to the individual product table for the exact available range.

Dimensional Information:

The catalogue provides:

• End-to-end dimensions.
• Dimensional tolerances.
• Thread gauge diameters.
• Threads per inch.
• Minimum female-thread length.
• Minimum male-thread length.
• Body wall thickness.
• External band and rib dimensions.

Manufacturing Process:

The catalogue describes a mechanized production process with quality control at each manufacturing stage.

Manufacturing operations include:

• Casting.
• Annealing.
• Material treatment.
• Thread machining.
• Dimensional inspection.
• Galvanizing where required.
• Final inspection.

Applications:

• Firefighting systems.
• Automatic sprinkler systems.
• Water piping.
• Compressed-air systems.
• Gas piping.
• Steam piping.
• Oil piping.
• Heating systems.
• Mechanical services.
• Commercial buildings.
• Industrial facilities.
• Warehouses.
• Service rooms.
• Maintenance and modification work.
• Valve and equipment connections.

Benefits of Threaded Fittings:

• Convenient installation for small and medium pipe sizes.
• No field welding required at the threaded connection.
• Easy removal and replacement during maintenance.
• Wide variety of fitting shapes and sizes.
• British, American and German thread options.
• Black and galvanized finishes.
• Equal and reducing configurations.
• Suitable for network modification and expansion.

Information Required Before Quotation:

• Fitting type.
• Figure number.
• Product name.
• Nominal size.
• Reducing dimensions where applicable.
• British, American or German thread.
• Taper or parallel thread where applicable.
• Black or galvanized finish.
• System fluid.
• Operating temperature.
• Working pressure.
• Quantity.
• Project technical requirements.
• Consultant and authority requirements.

Installation Notes:

• Confirm that pipe and fitting thread types match.
• Clean the threads before installation.
• Use a thread-sealing material compatible with the fluid and application.
• Do not install fittings with cracks or damaged threads.
• Avoid excessive tightening that could damage the fitting body.
• Use suitable installation tools.
• Pressure-test the completed piping system.
• Confirm that the selected finish is suitable for the environment.
• Review the pressure-temperature table before final use.

Important Note:

All Hitachi fittings in the supplied file are grouped under one product page because the manufacturer issued them as one complete Gourd Brand Malleable Iron Pipe Fittings catalogue.

Refer to the attached catalogue for the full fitting list, figure numbers, sizes, dimensions, tolerances, thread types and detailed working-pressure information.