FM UL Approved 3" Cast Iron Blue Flexible Grooved Coupling

• Customization: Available
• Connection: Female
• Structure: Metal Bellows
• Model NO.: WAN268
• Flexible or Rigid: Flexible
• Material: Iron
• Standard: Standard
• Packaging Detail: Product Packaged in Cartons on Wood Pallet or Case
• Delivery Detail: Within 30 Days After Confirming The Order
• Size: 1"-12"
• Working Pressure: 300psi, 2.07MPa
• Payment: Tt/LC
• Name: Flexible Coupling
• Product Material: Ductile Iron
• Transport Package: Export Standard Sea-Worthy Packing
• Specification: 1"-12
• Trademark: Kingmertal
• Origin: China (Mainland)
• HS Code: 73071100
• Production Capacity: 500 Ton/Tons / Month

Product Description

FOUR COLORS AVAILANLE : RED ,ORANGE ,GALVANIZED ,BLUE ...

Specifications
ductile iron Flexible coupling / fire fighting / grooved fittings
1.FM UL approved 
2.Size:1-12" 
3.Material:ductile iron 
4.Surface :painting,epoxy,hot dip galvanzed
Ductile Iron Rigid Coupling
 

UL FM Flexbile Coupling
Nominal Size mm/in	Pipe O.D mm/in	Working Pressure PSI/MPa	Dimensions mm/in
			Ø	L	H
25  1	33.7  1.327	300  2.07	55.  2.165	95  3.74	45  1.772
32  1¼	42.4  1.669	300  2.07	65  2.559	105  4.133	45  1.772
40  1½	48.3  1.900	300  2.07	71.  2.795	110     4.331	45  1.772
50  2	60.3  2.375	300  2.07	82  3.228	124  4.882	45  1.772
65  2½	73.0  2.875	300  2.07	98  3.858	141 5.551	45  1.772
65  3OD	76.1  3.000	300  2.07	100  3.937	142  5.59	45  1.772
80  3	88.9  3.500	300  2.07	113  4.449	160  6.299	46  1.811
100  4	114.3  4.500	300  2.07	142  5.59	190  7.48	49  1.929
125  5.5OD	139.7 5.500	300  2.07	168  6.614	218  8.583	49  1.929
150  6.5OD	165.1  6.500	300  2.07	194  7.638	244  9.606	49  1.929
150  6	168.3       6.625	300  2.07	198  7.795	248  9.764	49  1.929
200 8	219.1  8.625	300  2.07	256.  10.079	320  12.598	60  2.362
250  10	273  10.748	300  2.07	328  12.913	420  16.535	64  2.52
300  12	323.9  12.752	300  2.07	380  14.961	454  17.874	64  2.52

WE KINGMETAL , MANUFACTURER OF STEEL PIPE AND PIPE FITTINGS ,HAVE EXPORTING EXPERIENCE FOR MORE THAN 20 YEARS ,OUR PRODUCTS APPROVE ISO, TUV, PED ,API  CERTIFICATE .
                                   DETAILS    

Name	Rigid and flexible Coupling, elbow, tee, cross, reducer, cap, mechanical tee, mechanical cross, flange adaptor
Standard	ANSI, ASTM, ISO
Type	Manufacturer,trading company
Material	Ductile iron
Finish	Paint, Epoxy or Galvanization
Approval	FM/UL

Introduction to Ductile Iron Grooved Fittings

Ductile Iron Grooved Fittings are pipe connectors made of ductile iron, designed for quick installation using grooves and couplings. They are widely used in fire protection, water supply/drainage, HVAC, and industrial piping systems.

 

Key Features

1. High Strength & Corrosion Resistance

   • Ductile iron offers higher tensile strength and better corrosion resistance compared to standard cast iron (typically coated with zinc or epoxy).

2. Quick Installation

   • Uses grooved mechanical joints-no welding or threading required, saving time and labor costs.

3. Seismic & Movement Tolerance

   • Flexible connections absorb vibrations and minor displacements, making them ideal for earthquake-prone areas.

4. Excellent Sealing

   • Rubber gaskets (EPDM/NBR) ensure leak-proof performance, even under high pressure.

5. Easy Maintenance & Disassembly

   • No pipe cutting needed, simplifying system modifications or repairs.
      

     Common Standards

   • International Standards:

     • ASTM A536 (Ductile Iron Material)

     • AWWA C606 (Grooved Joints)

     • UL/FM (Fire Safety Certifications)

   • Chinese Standards:

     • GB/T 13295 (Ductile Iron Pipes for Water/Gas)

     • CJ/T 156 (Grooved Pipe Couplings)

   • Ductile Iron Grooved Fittings are widely adopted in fire protection, plumbing, HVAC, and industrial systems due to their high strength, rapid installation, and vibration resistance. They are particularly suited for projects requiring efficiency, reliability, and long-term durability.

      

     Advantages vs. Traditional Methods

     Feature	Grooved	Welded	Threaded
     Installation	Fast (no heat)	Slow (welder)	Moderate (threading)
     Seismic Performance	Excellent (flexible)	Poor (rigid)	Fair (prone to loosening)
     Maintenance	Easy disassembly	Permanent	Removable but wears out
     Pipe Compatibility	Steel, stainless steel	Metal pipes only	Small-diameter metal pipes

   • Ductile Iron Grooved Fittings are widely adopted in fire protection, plumbing, HVAC, and industrial systems due to their high strength, rapid installation, and vibration resistance. They are particularly suited for projects requiring efficiency, reliability, and long-term durability.
   • 

GUANGZHOU KINGMETAL STEEL INDUSTRY CO., LTD. is an Industry Group Company. It is a professional company in designing,
producing and selling steel pipe, pipe fittings, flanges, valves . We have our own big factories with modern machine line to make high
quality products, which is mainly to be exported to oversea markets.

We are pure-hearted and awaiting for your kind attention to our company..