JIANZHI Malleable Iron Threaded Pipe Fittings

JIANZHI offers a comprehensive range of malleable iron threaded pipe fittings for fire-protection, water, gas, oil, heating and water-treatment piping systems.

This page combines all products supplied in the JIANZHI catalogue into one complete product-range page because the manufacturer issued the file as an integrated threaded-fittings catalogue rather than separate documents for each individual fitting.

The range includes elbows, tees, crosses, sockets, couplings, unions, reducers, bushings, nipples, caps, plugs and multiple male and female threaded configurations.

Company Overview:

The catalogue states that JIANZHI was established in 1982 and manufactures and supplies malleable cast-iron pipe fittings.

The file presents the company’s production facilities, quality-control processes, testing equipment and international distribution network.

Main Product Families:

Elbows:

• 90° Elbows.
• 45° Elbows.
• Reducing Elbows.
• Street Elbows.
• Male and Female Elbows.
• Equal and reducing configurations.

Tees:

• Equal Tees.
• Reducing Tees.
• Side Outlet Tees.
• Male and Female Tees.
• Multi-size outlet arrangements.

Crosses:

Four-way threaded crosses for creating multiple pipe branches from one connection point.

Sockets and Couplings:

• Equal Sockets.
• Reducing Sockets.
• Banded Sockets.
• Plain Sockets.
• Full Thread Sockets.
• Right-Hand and Left-Hand Thread Sockets.

Unions:

Threaded unions allow connected piping or equipment to be separated without rotating the complete piping section.

They are suitable for:

• Valve connections.
• Equipment connections.
• Maintenance points.
• Locations requiring regular disassembly.

Reducers and Bushings:

The range includes:

• Reducing Sockets.
• Reducing Tees.
• Reducing Elbows.
• Reducing Bushings.
• Reducing Nipples.

Caps and Plugs:

• Caps close male-threaded pipe ends.
• Plugs close female-threaded outlets.

Material:

The catalogue identifies the material as:

• Malleable Cast Iron.
• Blackheart Malleable Iron.
• EN 1562 or ISO 5922.

Mechanical Properties:

• Tensile strength: 350 MPa.
• Elongation: 10%.

Design and Dimension Standards:

• EN 10242.
• ISO 49.

Thread Standards:

• EN 10226.
• ISO 7-1.

The catalogue highlights control of thread-axis angle, thread tolerance and air-tightness.

Available Surface Finishes:

• Black.
• Hot-Dip Galvanized.
• Electrogalvanized.

Hot-Dip Galvanized fittings provide increased corrosion protection for suitable applications.

Zinc Coating:

The catalogue shows an average zinc-layer thickness of approximately:

• 70 μm for selected galvanized products.

The zinc layer is required to be continuous and free from defects that could impair fitting performance or installation.

Available Sizes:

• Approximately 1/8 inch to 6 inches, depending on fitting type.

Product Types:

• Heavy Duty Banded.
• Medium Duty Banded.
• Light Duty Beaded.

Working Pressure:

The catalogue overview shows a working pressure of:

• Up to 363 PSI.
• Approximately 2.5 MPa.
• Approximately 25 bar.

Pressure-Temperature Ratings:

From -20°C to 120°C:

• Maximum permissible working pressure: 2.5 MPa.

At higher temperatures, the allowable pressure decreases according to the catalogue table.

At 300°C:

• Maximum permissible working pressure shown: approximately 2.0 MPa.

Hydrostatic Design Test Pressure:

For sizes 1/8 inch to 4 inches:

• 10 MPa.

For sizes 5 and 6 inches:

• 6.4 MPa.

Approvals and Certifications Shown:

• UL.
• FM Approved.
• ISO 9001.
• ISO 14001.
• Occupational health and safety management certifications.
• Additional technical and patent certificates.

Approval status must be verified for the selected fitting, size and configuration.

Production and Quality Control:

The catalogue shows:

• DISA molding lines.
• Automatic molding equipment.
• Sand-mixing systems.
• CNC machining equipment.
• Internal laboratory testing.
• Galvanizing and surface-treatment lines.
• Dimensional and thread inspection.
• Air-tightness testing above 0.6 MPa.

Applications:

• Firefighting systems.
• Fire piping.
• Water-supply pipelines.
• Gas pipelines.
• Oil pipelines.
• Heating systems.
• Building gas systems.
• Water-treatment systems.
• Commercial buildings.
• Industrial facilities.
• Infrastructure projects.
• Maintenance and modification work.

Projects Shown in the Catalogue:

• Beijing Daxing International Airport.
• Canton Tower.
• National Stadium.
• Shanghai World Financial Center.

Benefits:

• Improved mechanical properties.
• Accurate thread machining.
• Controlled thread-axis alignment.
• Good air-tightness.
• Multiple fitting shapes and sizes.
• Black and galvanized finishes.
• Ease of installation and maintenance.
• Suitability for multiple piping applications.

Information Required Before Procurement:

• Fitting type.
• Model or figure.
• Nominal size.
• Thread type.
• Required finish.
• System fluid.
• Operating pressure.
• Operating temperature.
• Required approval.
• Quantity.
• Project and consultant requirements.

Installation Notes:

• Confirm matching thread standards.
• Clean threads before installation.
• Use compatible thread sealant.
• Do not install cracked or damaged fittings.
• Avoid excessive tightening.
• Use suitable installation tools.
• Pressure-test the completed piping system.
• Confirm there is no leakage.
• Select the appropriate finish for the environment.
• Review the pressure-temperature table before final use.

Important Note:

All JIANZHI products in the supplied file are grouped under one product page because the manufacturer issued them in one complete malleable iron threaded fittings catalogue.

Refer to the attached catalogue for the complete fitting list, sizes, dimensions, threads, finishes, pressure ratings and detailed technical data.