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Technical Details

Our ductile iron fittings are produced with vacuum lost foam Process according to standard ISO2531 EN545 and EN598.

Advantages of vacuum lost foam technique:

a) Higher productivity and faster delivery.

b) The castings have excellent finish with much less pinhole or blowhole.

c) With even thickness.

d) Maintains high dimensional accuracy, which is so vital for the leak-tightness.

e) Any combination and length of fittings can be more flexible.

1. Chemical Analysis


2. Mechanical Properties

ItemTensile Strength (N/mm2)Elongation (%)Hardness(HB)
Fitting≥ 420≥ 5≤250

3. Standard Ductile Iron Fitting Types:

No.Ductile Iron Fitting TypeGraph
1Flanged SocketFlanged Socket
2Flanged SpigotFlanged Spigot
4Double Socket BendDouble Socket Bend
5All Socket TeeAll Socket Tee
6Double Socket Tee with Flanged BranchDouble Socket Tee with Flanged Branch
7Double Socket TaperDouble Socket Taper
8Double Flanged BendDouble Flanged Bend
9All Flanged TeeAll Flanged Tee
10Double Flanged TaperDouble Flanged Taper
11Blank FlangeBlank Flange
12Socket Flanged TaperSocket Flanged Taper
13Socket Spigot BendSocket Spigot Bend
14Flange Socket CrossFlange Socket Cross
15All Flanged CrossAll Flanged Cross

Note: For non-standard or special fittings, welcome contact us for more information!

4. Minimum Works Hydrostatic Test Pressure (unit: Bar, during time: 10s)

Nominal DiameterDN80-300DN350-600DN700-2600
Pressure25 bar16 Bar10bar

Packing and transportation of Ductile Iron Fittings:

Compared with ductile iron pipes storage and transportation, Fittings are much easier.

If Fittings size≤DN300, we arrange packing in timber cage or wooden cartons. For those ≥DN300, we arrange packing in wooden pallets.

Technical Details

Loose Flange:

SLR has also introduced fittings with Adjustable Flange or Loose Flange. in this case, separately cast loose Flanges can be freely rotated around the axis of the fittings.

As it can be fixed and removed easily, dismantling of adjoining accessories becomes easier. Angles can be adjusted.

The PN rating of the Fittings can be changed at will, just by changing the loose flange.

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