OFFSHORE MOORING CHAIN

Depending on the nominal tensile strength of the steels used for manufacture, chains are to be subdivided into five grades, i.e.: R3, R3S, R4, R4S, and R5.
Diameter:34mm-162mm
Grade: R3, R3S, R4, R4S, R5
ABS, LR, BV, DNV, CCS Certificate
Applications: offshore oil platform, offshore oil storage ship, offshore buoys, fishing farm, and aquaculture purposes.
Followed Rules: OFFSHORE STANDARD DNV-OS-E302, IACS-W22-OFFSHORE MOORING CHAIN
For other types of Marine chains, Industrial chains, please check our website.

PROOF & BREAKING TEST LOAD TABLET

Chain Diameter	R3		R3s			R4
Chain Diameter	Stud/StudlessProof Load(kN)	BreakingLoad(kN)	Studless Proof Load(kN)	StudProof Load(kN)	Breaking Load(kN)	Studless Proof Load(kN)	Stud Proof Load(kN)	Breaking Load(kN)
34	745	1065	831	859	1189	917	1031	1308
36	832	1189	928	960	1327	1024	1152	1461
38	923	1319	1030	1065	1473	1136	1278	1621
40	1019	1456	1136	1176	1626	1254	1411	1789
42	1119	1599	1248	1291	1786	1377	1549	1965
44	1223	1748	1364	1411	1952	1505	1693	2148
46	1331	1903	1485	1536	2124	1639	1843	2338
48	1444	2064	1610	1666	2304	1777	1999	2536
50	1560	2230	1740	1800	2490	1920	2160	2740
52	1681	2403	1875	1940	2683	2069	2327	2952
54	1806	2581	2014	2083	2882	2222	2500	3171
56	1934	2764	2157	2231	3086	2380	2677	3396
58	2066	2953	2304	2384	3297	2543	2860	3628
60	2202	3147	2456	2541	3514	2710	3049	3867
62	2342	3347	2612	2702	3737	2882	3242	4112
64	2485	3552	2771	2867	3966	3058	3440	4364
66	2632	3762	2935	3036	4200	3239	3644	4622
68	2782	3977	3103	3210	4440	3424	3852	4886
70	2936	4196	3274	3387	4686	3613	4065	5156
73	3173	4535	3539	3661	5064	3905	4393	5572
76	3417	4885	3812	3943	5454	4206	4731	6002
78	3584	5124	3998	4136	5721	4411	4963	6295
81	3841	5490	4284	4432	6130	4727	5318	6746
84	4104	5866	4578	4735	6550	5051	5682	7208
87	4374	6252	4879	5047	6981	5383	6056	7682
90	4651	6648	5187	5366	7423	5724	6439	8168
92	4838	6916	5397	5583	7723	5955	6699	8498
95	5125	7326	5717	5914	8180	6308	7096	9002
97	5320	7604	5934	6138	8491	6547	7366	9343
100	5616	8028	6264	6480	8964	6912	7776	9864
102	5817	8316	6489	6712	9285	7160	8055	10217
105	6123	8753	6830	7065	9774	7536	8478	10755
107	6330	9049	7061	7304	10104	7791	8765	11118
111	6751	9650	7530	7789	10775	8309	9347	11857
114	7072	10109	7888	8160	11288	8704	9792	12421
117	7398	10575	8251	8536	11808	9105	10243	12993
120	7728	11047	8620	8917	12335	9511	10700	13573
122	7951	11365	8868	9174	12690	9785	11008	13964
124	8175	11686	9118	9433	13048	10062	11319	14358
127	8515	12172	9498	9825	13591	10480	11790	14956
130	8859	12663	9881	10222	14140	10903	12266	15559
132	9090	12994	10139	10488	14509	11188	12586	15965
137	9674	13829	10791	11163	15442	11907	13395	16992
142	10268	14677	11452	11847	16389	12637	14217	18034
147	10869	15536	12123	12541	17348	13377	15049	19089
152	11476	16405	12800	13242	18318	14125	15890	20157
157	12090	17282	13485	13950	19297	14880	16740	21235
162	12708	18166	14175	14664	20284	15641	17596	22321

PROOF & BREAKING TEST LOADS, WEIGHT & LENGTH OVER 5 LINKS TABLET

Test Load, in kN	Grade R3 Stud Link	Grade R3S Stud Link	Grade R4 Stud Link	Grade R4S Stud Link	Grade R5 Stud Link
Proof	0.0148 d2 (44 – 0.08d)	0.0180 d2 (44 – 0.08d)	0.0216 d2 (44 – 0.08d)	0.0240 d2 (44 – 0.08d)	0.0251 d2 (44 – 0.08d)
Break	0.0223 d2 (44 – 0.08d)	0.0249 d2 (44 – 0.08d)	0.0274 d2 (44 – 0.08d)	0.0304 d2 (44 – 0.08d)	0.0320 d2 (44 – 0.08d)
Test Load, in kN	Grade R3 Studless	Grade R3S Studless	Grade R4 Studless	Grade R4S Studless	Grade R5 Studless
Proof	0.0148 d2 (44 – 0.08d)	0.0174 d2 (44 – 0.08d)	0.0192 d2 (44 – 0.08d)	0.0213 d2 (44 – 0.08d)	0.0223 d2 (44 – 0.08d)
Break	0.0223 d2 (44 – 0.08d)	0.0249 d2 (44 – 0.08d)	0.0274 d2 (44 – 0.08d)	0.0304 d2 (44 – 0.08d)	0.0320 d2 (44 – 0.08d)
Chain Weight, in kg/m	Stud link = 0.0219d2
Chain Weight, in kg/m	Studless chain Weight calculations for each design are to be submitted.
Pitch Length	Five Link Measure
Minimum	22d
Maximum	22.55d
*Note: data refers to IACS Offshore Mooring Chain Rules

MECHANICAL PROPERTIES OF OFFSHORE MOORING CHAINS & ACCESSORIES

Grade	Yield stress N/mm2 minimum (1)	Tensile strength N/mm2 minimum (1)	Elongation % minimum	Reduction (3) of area % minimum	Charpy V-notch impact tests
Grade	Yield stress N/mm2 minimum (1)	Tensile strength N/mm2 minimum (1)	Elongation % minimum	Reduction (3) of area % minimum	Test temperature °C (2)	Average energy J minimum	Avg. energy flash weld J minimum
R3	410	690	17	50	0 -20	60 40	50 30
R3S	490	770	15	50	0 -20	65 45	53 33
R4	580	860	12	50	-20	50	36
R4S(4)	700	960	12	50	-20	56	40
R5(4)	760	1000	12	50	-20	58	42
*NOTES 1. Aim value of yield to tensile ratio: 0.92 max. 2. At the option of the Classification Society the impact test of Grade R3 and R3S may becarried out at either 0°C or minus 20°C 3. Reduction of area of cast steel is to be for Grades R3 and R3S: min. 40 %, for R4, R4Sand R5: min. 35 %, cf. item 2.4.4. 4. Aim maximum hardness for R4S is HB330 and R5 HB340.