Malleable Iron Union Fig 340 BSPT Taper Seat BS EN

Product Features (Specifications – Plain English List)

Model: Union Fig 340 BSPT
Type: Taper Seat Union Fig 340 BSPT (Cone Seat)
Material: Malleable Iron (EN-GJMB 350-10, BS EN 1562)
Connection: Female × Female Thread (Double Female)
Nominal Sizes: 1/2″, 3/4″, 1″, 1-1/4″, 1-1/2″, 2″, 2-1/2″, 3″, 4″ (DN15-DN100)
Thread Standard: BSPT (BS EN 10226-1, ISO 7-1)
Max Working Pressure: 25 bar (363 psi, PN25)
Working Temperature: -20°C ~ 120°C (-4°F ~ 248°F)
Surface Treatment: Hot-dip Galvanized (HDG), Black (Self-colour)
Sealing Type: Tapered Seat (Self-sealing design)
Certifications: CE, ISO 9001, UL Listed (Optional), FM Approved (Optional)
Standard: BS EN 10242 (ISO 49 equivalent)

Product details

Malleable iron union(taper seat) is a detachable fitting with both female threaded connections. It consists of a tail or male part, a head or female part, and a union nut, with taper seat.

Product Overview

The Model Union Fig 340 BSPT is a BS EN 10242 standard malleable iron Union Fig 340 BSPT with taper seat design, used for detachable sealed connection in European standard piping systems, especially suitable for pipeline nodes requiring frequent disassembly and maintenance.

Are you looking for a reliable, self-sealing, easy-to-install pipe Union Fig 340 BSPT that meets European standards?

This taper seat Union Fig 340 BSPT is made by precision casting with taper sealing surface that becomes tighter under higher pressure, featuring firm connection, strong sealing and efficient assembly in light and ordinary hazard piping systems.

Offered in a full range of nominal sizes, it is widely used in EU commercial buildings, factories, residential areas, hotels and BS EN standard fire systems, especially suitable for water, oil and gas pipelines.

Specifications Table (Dimensions & Parameters)

SIZE		A (MM)	PCS/CTN.
1/4”	DN8	42	200
3/8”	DN10	45	200
1/2”	DN15	47	180
3/4”	DN20	51.5	120
1”	DN25	57	88
1 1/4”	DN32	65	56
1 1/2”	DN40	71	36
2”	DN50	79	28
2 1/2”	DN65	85.5	12
3”	DN80	94.5	10
4”	DN100	110.5	6

Product Applications

Intended Use: Used for detachable Union Fig 340 BSPT connection in BS EN standard fire sprinkler systems, water supply & drainage systems and industrial fluid pipelines, especially suitable for pipeline nodes requiring regular inspection, valve replacement and instrument maintenance; suitable for EU and export projects, including commercial buildings, industrial plants, residential areas, hotels and shopping malls; compatible with Class A fire protection piping.
Compatibility: Works with malleable iron fittings, galvanized steel pipes, valves and meters with BSPT threads to BS EN standards, featuring self-sealing taper design that doesn’t require additional sealing elements for reliable sealing.

Installation and Maintenance

Installation Guide

Clean female pipe threads and Union Fig 340 BSPT taper sealing surfaces, remove burrs, dust and impurities.
Align one end of the Union Fig 340 BSPT body with pipe female threads, screw in by hand until taper surface contact.
Align the other pipe with the other end of the Union Fig 340 BSPT, screw in by hand.
Hold both ends of the Union Fig 340 BSPT with a wrench and tighten the nut symmetrically to ensure even taper surface contact, avoiding one-sided force.
After installation, conduct pipeline pressure test at 1.5 times working pressure according to BS EN standard to ensure no leakage.

Maintenance Tips

① Inspection Schedule: Visual inspection quarterly; monthly in corrosive environments, checking corrosion, deformation, thread damage and leakage.

② Cleaning Method: Wipe the surface and taper sealing area with clean soft cloth; do not use sharp tools or strong acid/alkali solvents to damage threads and surface coating.

③ Replacement Cycle: Replace after 15–20 years of normal use or immediately if thread slipping, sealing failure or serious corrosion occurs.

④ Disassembly Tips: Loosen the nut symmetrically during disassembly to avoid thread damage caused by taper surface adhesion.

Related Products

Malleable Iron Flat Seat Union Fig 340 BSPT (BS EN)
Malleable Iron Female Elbow (BS EN)
Malleable Iron Female Tee (BS EN)
Malleable Iron Plug (BS EN)
Malleable Iron Reducing Bushing (BS EN)

Recommendation: Matching with EN series BS EN standard malleable iron fittings to build a fast-maintenance, stable and sealed European standard piping system. The taper seat Union Fig 340 BSPT is especially suitable for pipeline nodes requiring frequent disassembly and assembly.

FAQ

Can you supply OEM?

OEM is available. We can customize the product according to your specific requirements, including logo printing and packaging design.

What’s the MOQ?

The MOQ is 500 pieces. For customized products with special sizes or surface treatments, the MOQ may vary.

How about the order processing and lead time?

After order confirmation and receipt of the advance payment, we will arrange production. Generally, the products can be ready for shipment within 15-20 working days. Once dispatched, we will notify you and provide all necessary documents for customs clearance.

What quality will be ensured?

All products are 100% new and undergo strict quality inspections, including pressure testing and dimensional checks, before delivery. We use sturdy wooden crates or cartons to ensure the products are well-protected during transportation.

Can you guide the installation?

Yes, we provide detailed installation instructions in English and other major languages. Our technical support team is also available for online consultation and guidance if needed.

Contact Information

Sales Inquiry:
Provide contact information for sales inquiries.

Email: [email protected]

Phone: +86 13012223295

Technical Support：

If you have any questions regarding product installation, commissioning, operation or maintenance, please contact our technical support team for professional assistance:

Email: [email protected]