Flat Link Chain

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Category: flat link chain, mining flat link chain, mining round link chain, DIN 22255 flat link chains for use in continuous conveyors in mining, flight bar chain system, flat type chains,super flat type chains, double flat type chains

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Application

Armored Face Conveyors (AFC),Beam Stage Loaders (BSL),road header machines

Flat type link chain was firstly introduced into mining industry by German chain making company back in 1985. The flat link chain consists of round links (DIN 22252) but every second link (the vertical link) is flat link which straight sides are of flattened finish per DIN 22255. Due to the less outer width of flat link (vertical) than round link (horizontal), the full flat link chain height is thus as lower as flat link size.

SCIC flat links are of forged making, and from the same material as round links.

Dimensionally, the flattened straight cross section area is larger than that of round link. When the full flat link chain goes through designed heat-treatment and final inspection & testing, the mechanical properties of flat links are well guaranteed per designated chain size & grade.

SCIC flat link chain is made according to China MT/T-929 standard and factory Technical Requirements, as well as to DIN 22255 or clients specs (which is to be specially agreed).

SCIC flat link chain is used for Armored Face Conveyors (AFC), Beam Stage Loaders (BSL), road header machines and other equipment that requires this type of chain.

Anti-corrosive coatings (e.g., hot dipped galvanization) result in decreased chain mechanical properties, therefore the application of any anti-corrosive coatings shall subject to order agreement between buyer and SCIC.

Figure 1: flat link chain

Table 1: flat link chain dimensions

chain size *d x t*	diameter d (mm)		width e (mm) (max.)	pitch t (mm)		round link width (mm)		flat link width (mm)		unit weight kg/m (~)
chain size *d x t*	nominal	tolerance	width e (mm) (max.)	nominal	tolerance	inner b1 (min.)	outer b2 (max.)	inner b3 (min.)	outer b4 (max.)	unit weight kg/m (~)
26 x 92	26	± 0.8	27	92	± 0.9	30	86	30	74	12.8
30 x 108	30	± 0.9	33	108	± 1.0	34	98	34	86	18.0
34 x 126	34	± 1.0	37	126	± 1.2	38	109	38	97	22.7
38 x 126	38	± 1.1	42	126	± 1.4	42	121	42	110	29.4
38 x 137	38	± 1.1	42	137	± 1.4	42	121	42	110	28.5
38 x 146	38	± 1.1	42	146	± 1.4	42	121	42	110	28.4
42 x 146	42	± 1.3	46	146	± 1.5	46	135	46	115	34.2
42 x 152	42	± 1.3	46	152	± 1.5	46	135	46	115	35.0
notes: larger size chain available upon inquiry. Link size (d) to be measured at link straight opposite link weld. Link width to be measured off the link weld.

Table 2: flat link chain mechanical properties

chain size *d x t* (mm)	chain grade	test force (kN)	elongation under test force % (max.)	breaking force (kN)	elongation at fracture % (min.)	minimum deflection (mm)
26 x 92	S	540	1.4	670	11	26
26 x 92	SC	680	1.6	850	11	26
30 x 108	S	710	1.4	890	11	30
30 x 108	SC	900	1.6	1130	11	30
34 x 126	S	900	1.4	1140	11	34
34 x 126	SC	1160	1.6	1450	11	34
38 x 126 38 x 137 38 x 146	S	1130	1.4	1420	11	38
38 x 126 38 x 137 38 x 146	SC	1450	1.6	1810	11	38
42 x 146 42 x 152	S	1390	1.4	1740	11	42
42 x 146 42 x 152	SC	1770	1.6	2220	11	42
note: deflection not applicable to forged flat link