ISO 13795-2012 Welded Double Bollard

Material: Welded Steel Plate or Steel Tube

Size: 150mm – 600mm

SWL: 54KN to 1401KN

Weight: 29KG to 1391KG

Certificate: CCS, ABS, BV, DNV, LR, etc.

Overview

Describe：

ISO 13795-2012 Welded Double Bollard is a type of maritime structure used for mooring ships and other vessels. It consists of two bollards, typically made of steel, that are welded together to form a single unit. Double bollards provide increased stability and strength compared to single bollards, making them suitable for securing larger vessels or in areas with higher mooring loads.

Manufacturing and inspection：

1.The requirement for all surfaces, including welded areas, to be flawless and free from imperfections ensures structural integrity and longevity.

2.Surfaces in contact with mooring ropes must be smooth to prevent abrasion and damage to the ropes, maintaining their strength and integrity during mooring operations.

3.External coating with an anti-corrosion protective finish enhances the bollards' durability and resistance to environmental degradation, particularly in marine environments where corrosion is a significant concern.

4.Avoiding low-friction surface coatings helps maintain optimal friction between the mooring ropes and the bollards, ensuring a secure grip and maximizing the holding force, especially during figure-of-eight belay mooring techniques commonly used in maritime settings.

Type：

Depending on the construction, welded steel bollards shall be classified as the following two types:

Drawing of Type A - with compact base plate

ISO 13795-2012 Welded Double BollardA.jpg

Specification of ISO 13795-2012 Marine Double Bollard Type A:

Nominal Size	Dimensions（mm）															Welding leg length			SWL						Calculated weight
																			For mooring purposes (Figure-of-eight belay)				For towing purposes (eye splice)
																			For mooring purposes (Figure-of-eight belay)
																			One-rope use		Two-rope use
DN	D1	D2	D3	D4	H1	H2	H3	H4	b	L	E	t	t1	t2	R	z1	z2		(kN)	(t)	(kN)	(t)	(kN)	(t)	（kg）
150	165.2	185	-	80	330	90	70	60	155	400	-	8	6	6	40	3.5		3.5	54	5.5	49	5	383	10	29
200	216.3	240	-	130	395	115	70	60	205	500	-	8	6	6	50	3.5		3.5	82	8.4	65	6.7	579	13	46
250A	267.4	290	-	160	505	135	90	75	250	630	-	12	9	8	60	5.5		4	156	16	134	14	1315	27	107
250B	267.4	290	-	160	505	135	90	75	250	630	-	10	8	7	60	5.5		4	127	13	108	11	215	22	91
300A	318.5	340	150	185	600	150	110	85	290	800	300	21.5	16	9	70	10.5		4	332	34	306	31	3365	62	281
300B	318.5	340	150	185	600	150	110	85	290	800	300	12	9	9	70	10.5		4	186	19	161	16	352	36	166
350A	355.6	380	170	200	685	175	130	105	340	890	350	26	19	11	80	12.5		5	443	45	418	43	5062	85	431
350B	355.6	380	170	220	685	175	130	105	340	890	350	14	10	9	80	7		4	244	25	216	22	2855	50	241
400A	406.4	430	190	230	730	185	145	115	380	1000	380	28	20	13	85	12.5		6	594	61	521	53	6632	106	570
400B	406.4	430	190	250	730	185	145	115	380	1000	380	15	11	11	85	8		5	326	33	269	27	3816	67	322
450A	457.2	480	210	265	770	195	160	120	425	1100	410	29	21	14	90	12		7	753	77	612	62	8201	124	712
450B	457.2	480	210	285	770	195	160	120	425	1100	410	14.5	11	11	90	8		7	382	39	292	30	4483	78	379
500A	508	530	235	295	830	230	200	150	480	1250	460	32	23	16	100	12.5		8	992	101	757	77	10928	154	960
500B	508	530	235	320	830	230	200	150	480	1250	460	14.5	11	11	100	8		5	457	47	326	33	5474	93	465
550A	558.8	580	255	330	900	270	200	180	520	1380	540	31	22	16	110	11.5		8	1131	115	812	83	12635	165	1123
550B	558.8	580	255	350	900	270	200	180	520	1380	540	21	16	11	110	11.5		5	781	80	541	55	9280	159	787
600	609.4	630	280	365	950	300	200	200	560	1550	600	33	23	16	120	11.5		8	1401	143	948	97	15539	193	1391

Drawing of Type B with wide base plate

7YFR)Z{W@JU}N8Y3OH~06QO.png

Specification of ISO 13795-2012 Marine Double Bollard Type B:

Nominal Size	Dimensions（mm）														Welding leg length		SWL						Calculated weight
																	For mooring purposes				For towing purposes (eye splice)
																	(Figure-of-eight belay)
																	One-rope use		Two-rope use
DN	D1	D2	H1	H2	h1	h2	b	L	L1	E	t	t1	t2	R	z1	z2	(kN)	(t)	(kN)	(t)	(kN)	(t)	（kg）
150	165.2	185	320	80	62	70	225	400	670	145	8	8	6	40	3	3	54	5.5	49	5.0	540	10	45
200	216.3	240	365	85	67	70	290	500	860	160	8	8	6	50	3	3	82	8.4	65	6.7	795	13	68
250A	267.4	290	470	100	79	90	360	630	1065	215	12	11	8	60	4	4.5	156	16	134	14	1736	27	150
250B	267.4	290	470	100	79	90	360	630	1065	215	10	8	7	60	3	3.5	127	13	108	11	216	22	119
300A	318.5	340	575	125	95	110	430	800	1300	325	21.5	20	9	70	4	8	332	34	306	31	4365	62	383
300B	318.5	340	575	125	95	110	430	800	1300	325	12	9	9	70	4	5	186	19	161	16	353	36	203
350A	355.6	380	655	145	108	130	480	890	1475	360	26	23.5	11	80	5	10	443	45	418	43	6543	85	582
350B	355.6	380	655	145	119	130	480	890	1475	360	14	13	9	80	4	5.5	244	25	216	22	3757	50	333
400A	406.4	430	705	160	121	145	550	1000	1630	400	28	26	13	85	6	11	594	61	521	53	8819	106	793
400B	406.4	430	705	160	133	145	550	1000	1630	400	15	13.5	11	85	5	5.5	326	33	269	27	4983	67	441
450A	457.2	480	745	170	131	160	620	1100	1810	430	29	26	14	90	7	11	753	77	612	62	10820	124	979
450B	457.2	480	745	170	144	160	620	1100	1810	430	14.5	13	11	90	7	5.5	382	39	292	30	5837	78	517
500A	508	530	790	190	146	200	690	1250	2040	500	32	29	16	100	8	12	992	101	757	77	14470	154	1321
500B	508	530	790	190	162	200	690	1250	2040	500	14.5	13	11	100	5	5.5	457	47	326	33	7102	93	631
550A	558.8	580	840	210	167	200	750	1380	2240	560	31	28	16	110	8	11	1131	115	812	83	16628	165	1530
550B	558.8	580	840	210	176	200	750	1380	2240	560	21	19	11	110	5	8	781	80	541	55	11949	159	1059
600	609.4	630	875	225	182	200	820	1550	2490	660	33	28	16	120	8	11	1401	143	948	97	20042	193	1850