Product Overview

The MULTI/JOINT® 3057 Plus: Wide Range Flange Adaptor (Restraint) provides a secure, restraint connection for all types of pipe materials within the DN50 to DN1000 range. This flange adaptor is suitable for both water and gas applications, with NBR gaskets for gas and EPDM for potable water. Its body and clamping rings are made of ductile iron (GGG45 EN-GJS-450-10) with a RESICOAT epoxy powder coating, adhering to GSK standards and EN 14901 for superior corrosion protection. Featuring stainless steel Uni/Fiksers, bolts, nuts, and washers, this adaptor ensures a durable and reliable restraint connection. It allows for an angular deflection of up to 8° per socket during installation, providing flexibility for on-site conditions. Hygiene protection is included for DN50 - DN1025, ensuring the fitting remains clean from production to point of use. For restraint versions on plastic pipes, the use of an insert stiffener is mandatory. It has a minimum insertion depth (ID min) to ensure proper installation.

Key Benefits

• Suitable for all kinds of pipe material.
• Suitable for water and gas applications (EPDM for potable water, NBR for water and gas).
• Ductile iron body and clamping rings with RESICOAT epoxy powder coating for superior corrosion protection.
• Angular deflection of max. 8° per socket during installation for flexibility.
• Stainless steel Uni/Fiksers ensure optimal restraint.
• Stainless steel bolts, nuts, and washers (A2 or A4 quality).
• Hygiene protection included for clean installation.

Applications

• Connecting pipe systems of various materials in the ground.
• Water transport and distribution.
• Gas distribution.
• Waste water applications.
• Maintenance and repair solutions.
• Industrial applications.

Features & Construction

• Body and clamping ring(s): Ductile iron GGG45, EN-GJS-450-10.
• Coating: RESICOAT epoxy powder coating, type RT 9000 R4 (meets GSK standards and EN 14901; minimum layer thickness 250 µm; min. 3000 V spark test for zero porosity; min. 16 N/mm² adhesion).
• Gasket: NBR (EN 682, -5°C to +50°C) or EPDM (EN 681-1, 0°C to +50°C).
• Uni/Fiksers: Stainless steel A4 quality (AISI 316).
• Bolts: Stainless steel A2 quality (AISI 304) or A4 quality (AISI 316), PTFE coated.
• Nuts: Stainless steel A2 quality (AISI 304) or A4 quality (AISI 316), galvanised and passivated.
• Washers: Stainless steel A2 quality (AISI 304) or A4 quality (AISI 316).

Technical Specifications

MULTI/JOINT® 3057 Plus Wide Range Flange Adaptors are available for various nominal diameters and pressure ratings. The tables below outline the ranges and weights based on gasket and bolt material combinations (A2 or A4 stainless steel for bolts/nuts).

Range 1 (mm)	DN (mm)	Flange (mm)	Drilling Pattern	Weight (kg) (NBR/A2 Code)	Weight (kg) (EPDM/A2 Code)
46-71	50	50	PN16	4.700	4.700
63-90	65	60/65	PN16	5.700	5.700
84-105	80	80	PN16	6.800	6.800
104-132	100	100	PN16	8.000	8.000
132-155	125	125	PN16	10.200	10.200
154-192	150	150	PN16	14.200	14.200
192-232	200	200	PN10/PN16	23.600	23.600
267-310	250	250	PN10/PN16	31.600	31.600
315-356	300	300	PN10/PN16	44.100	44.100
352-393	350	350	PN10/PN16	51.000	51.000
392-433	400	400	PN10/PN16	62.100	62.100
450-482	450	450	PN10/PN16	77.300	77.300
500-532	500	500	PN10/PN16	91.600	91.600
605-637	600	600	PN10/PN16	118.200	117.700
709-741	700	700	PN10/PN16	187.000	187.000
799-831	800	800	PN10/PN16	216.200	216.200
899-931	900	900	PN10/PN16	246.000	246.000
994-1026	1000	1000	PN10/PN16	289.000	289.000

Installation & Maintenance

• Read the user manual for detailed installation instructions.
• For restraint versions on plastic pipes, the use of an insert stiffener (see accessories) is mandatory. This also applies specifically to MULTI/JOINT DN625 till DN1000 on plastic pipes.
• Fittings are maintenance-free and have a designed life expectancy of 50 years.
• Supplied with hygiene protection to prevent them from being contaminated or damaged, ensuring clean, safe, and durable work.