Ductile Iron fittings

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China ductile cast iron fittings bend/elbow with flange

TAWIL EN545/ISO2531 China ductile cast iron fittings bend/elbow with flange  :

Material:ductile iron Pipe Fitting;

Type: All sockets tee or All flange tee or double flange with flange branch tee;

Joint structure: Socket or Flange or mechanical joint  or Push-on Joint ;

Product Description

EN545/ISO2531/NBR7675 ductile iron pipe tee fittings product data:

       Joint structure >>>

TAWIL EN545/ISO2531 China ductile cast iron fittings bend/elbow with flange

       Mechanical Properties >>>

Centrifugal Cast Pipes




Tensile Strength







Proof Stress






The proof stress shall be measured only upon special agreement and under conditions which shall be specified in the order.

       Deviation and tolerances on length>>>

The permissible deviation on the standard working length of fittings with sockets and fittings with flanges are given in table as follows:

Type of fitting



Flanged socket  


DN80 to DN1200 ± 25                                      DN1400 to DN2000 ± 35

Flanged spigot











DN80toDN1000±(10+0.02DN) DN1200toDN2000±(10+0.025DN)


L and h

DN80toDN1200-25+50                                  DN1400todn2000-35+75

       Tolerances on manufacturing working lengths>>>

The standard tolerance on the manufacturing working lengths of all fittings with flanges in all nominal size is ±10mm On request in the order and by agreement between the manufacturer and the purchaser,smaller tolerances can be accepted but not less than: ±3mm for DN600and±4mm for DN≥700

       Works leak-tightness test>>>

The fitting shall be submitted at the works to a leak-tightness test,carried out either with air at a pressure of 1 par or with water at the pressure given in table as following:

Nominal size  DN

Hydrostatic leck-tightness test pressure bar


DI Pipe with weld-on or screwed-on flange















       Internal protection>>>

Spun the blast furnace cement mortar lining complying with the standard ISO4179, or we may offer special protective coating according to customers requirements.

       External Protection>>>

Metallic zinc complying with the standard ISO8179,and bitumen,or we may offer special protective coating according to the customer's requirements.

       Ductile iron pipe fittings-----BEND>>>

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Q:How can the ductile iron pipe be punched?
Main points: manual hydraulic drilling machine and drilling machine, drilling machine is to rely on human features manually through the drill holes in the pipeline: the need for manpower and time, simple operation and economic benefits; characteristics of the hydraulic drilling machine is through the electric pump or gasoline pump driven drill holes: human, mechanical opening. The need for daily maintenance, high cost. General aperture 300mm can be done by hand drilling machine
Q:How can ductile iron pipes be connected to steel tubes?
But pay attention, because ductile iron pipe material is crisp, and the two connecting flange sealing surface is best all the plane, in order to prevent the uneven force and damage to cast iron flange.
Q:Connecting process of ductile iron pipe spigot and socket rubber ring
Rubber seal ring is formed by one or several parts of the cover, fixed in a ring or a washer bearing and another ring or gasket contact or the formation of the labyrinth of narrow gap, to prevent leakage of lubricating oil and foreign matter.
Q:How many kinds of elbow of ductile iron pipe?
You can measure the big money to camber, can call to the manufacturers to build. Seems to have 12.5 and 22.5 degrees, in the first two months we used 22.5 degrees elbow, the drawback is not good pull
Q:How much is the installation of a two degree elbow for ductile iron pipe fittings at 11.25 degrees?
Ductile iron pipe, executive standard, GB/T13295-2008ISO2531/2008, national GB/T13295-91 standard, ISO2531-K9 class.
Q:Is the cast iron tube the same as the ductile iron pipe?
Cast iron pipes (Cast, Iron, Pipe), cast cast pipe. Cast iron pipes are used for water supply, drainage and gas transmission lines. They include cast iron pipes and pipe fittings. Labor intensity is small. According to the casting method, it is divided into continuous cast iron pipe and centrifugal cast iron pipe, in which the centrifugal cast iron pipe is divided into sand mould and metal type two kinds. Divided into gray cast iron pipe and nodular cast iron pipe according to different material. According to the interface form, it is divided into flexible interface, flange interface, self anchored interface, rigid interface and so on. Among them, the flexible iron pipes rubber sealing ring; flange interface cast iron pipe flange fixed in the rubber pad, the flange gasket sealing; rigid interface cast iron pipe socket is large, straight pipe is inserted, sealed with cement, this technology has been basically eliminated
Q:How to improve the quality of nodular cast iron pipe fittings
For cast iron pipe chute taphole bent or improper chute taphole distance socket distance, easy to form a skin defect in cast iron pipe socket parts, equipment manufacturing inspection of cast iron pipe fittings must be in production, replacing the cast iron pipe chute taphole elbow when necessary, and adjust the host making iron centrifuge when the pipe in the lower limit, shorten the chute taphole socket from the distance.
Q:How is the weight of nodular cast iron pipe calculated?
Ductile iron pipe is a kind of cast iron pipe. In quality, the spheroidization of cast iron pipes is controlled to be 1-3 (spheroidization rate 80%), so the mechanical properties of the cast iron pipes, ductile iron pipes and finished product libraries can be better improved, with the nature of iron and the properties of steel. Ductile cast iron pipe after annealing, the microstructure is ferrite and pearlite, good mechanical properties, excellent corrosion resistance, good ductility, good sealing effect, simple installation, mainly for municipal, industrial and mining enterprises, water supply, gas, oil etc..
Q:How to inspect ductile iron pipe fittings?
While the proportion of the so-called K8 class cement pipe and some manufacturers terrifying 3/4 or 3/5, as the water supply pipe 3/5 or no personally think that two of the proportion of the tube is not the problem, the most intuitive way of judging the quality of ductile pipe is cement and iron thickness ratio of thicker tube wall thickness of cement the better the quality, some manufacturers of production pipe, thick wall pipe head cast iron part looks to be thick, but there is also a thin iron pipe, so the judge quality to cut inside, personally think that the highest price of the manufacturer is Jinan steel, Jinan Iron and steel because the pipe quality can reach the national standard K9, the price is also below new, Saint Gobain and other major brands, as the water supply pipe K8 is no problem, but the price and quality for the construction of what importance Stronger.
Q:Comparison of C and K grades of ductile iron pipes
Using more than 18 cast iron, after adding the spheroidizing agent, the centrifugal casting of ductile iron machine caused by high-speed centrifugal tube, known as "ductile iron pipe."".

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