Ductile Iron Fittings

Ductile iron pipe fittings 1.Materail: Ductile Iron. 2.Standard: ISO2531, EN545. 3.Usage: Water Supplying Pipe

1,     Standard

ISO25311998(E), BSEN545-2002, GB13295-2003,

2,     Tyron Type T Type Push-on joint, K Type Mechanical joint, NII Type Mechanical joint, Flange joint,

3,     Flange nominal pressurePN10,PN16,PN25,PN40,    

4,     Main size

The size of fittings is DN40~2600,including T Type,K Type,N2 Type,Flange joint,

Main types of fittings

1,     Flanged Spigot

2,     Collar

3,     Flanged Socket

4,     Flanged Socket

5,     Socket Spigot

6,     Blank Flange

7,     Double Socket Bend

8,     Socket Spigot Bend

9,     Double Flanged Bend

10,    Double Socket Taper

11,    Double Flanged Taper

12,    Double Socket Tees with Flanged

13,    All Flanged Tee

14,    All Socket Tee

15,    Socket and Spigot Tees With Socket Branch

16,    Socket and Spigot Tees With Flanged Branch

17,    Double Socket Level Invert Tees with Flanged Branch

18,    Double Socket Level Invert Tee

19,    All Socket Tee with 45 degree Angle Branch

20,    All Flanged Tee with 45 degree Angle Branch

21,    Double Flaned 90 degree Duckfoot Bend

22,    Double Socket Off Set

23,    All Flanged Cross

24,    All Scoket Cross

25,    Cap

26,    Plug

27,    Double Flanged Pipe

28,    Flanged Adaptor

29,    Coupling

30,    Flange

5,  Requirement of Material

5,1 Mechanical properties of Ductile iron

Tensile Strength	Elongation	Yield Strength	Hardness
>=420MPa	>=5%	>=300MPa*	<=250HB

* Yield Strength only be checked at the user or customs’ request,

5,2 Requirement of process properties

5,2,1, Hydrostatic testtest pressure and time

DN	Pressure	Test time
<=300	>=25Pa	>=15S
350~600	>=16 Pa	>=15S
>=700	>=10 Pa	>=10S

5,2,2, Fittings for gas transportation should taken not only hydrostatic test ,but should taken Airtight test, the test pressure ≥4Pa,or at the concerned parties’ agreement,

6,  Lining and Surface Coating

6,1 All fittings should be coating external and internal,Fittings for water transportation should be with cement mortar lining, Fittings for gas transportation should coated bitumen inside, External should coated rich zinc paint and bitumen paint,

6,2 Cement mortar lining thickness and tolerance

DN	Lining thickness mm	Average min, thickness mm	Part min, mm	Limited tolerance mm
<=300	3,5	2,5	2,0	+2  –1
350~600	5,0	4,5	3,0	+2  –1
700~1200	6,0	5,5	4,0	+2  –1

6,3 Fittings for gas transportation should coated bitumen internal, the standard in accordance with external bitumen coating,

6,4 External coatingFittings external and socket internal should coated rich zinc paint and bitumen paint,

6,5 Requirement of thicknessThe average weight of zinc >=150g/m²,the local min thickness >=130g/m²

Ductile Iron Fittings