Articulated Pipe / Half Shell Pipe / Split Pipe / Ocean cable engineering / Dutile iron casting

Cable Protector is designed to provide protection for subsea cables at offshore wind or tidal energy foundations, in shallow water and at landfalls, boulder fields or areas of rocky seabed where cable burial is impractical.

In the course of using,a series of interlocking half shell are applied to form a vertebrae bend restrictor around the cable, the cable protectors are a development from conventional 'articulated pipe' (also known as 'split pipe') and are manufactured in ductile iron to provide:

• Protection against impact and abrasion
• Increased seabed stability through added weight
• Reliable and strong bend restriction to ensure that product minimum bend radius is respected
• Ease of installation and cost effective protection
• Greater articulation angle achieved at each joint than conventional split pipe, facilitating use over sheaves and chutes
• Smooth bore to facilitate longitudinal cable movement where required, for instance for cable pull-in or cable tension relief
• No sharp edges
• All bolted assembly. Identical top and bottom castings and use of large fasteners with built in nut recesses for simplicity, speed and reliability of assembly whether onshore, on deck or subsea by divers
• Smooth outer profile for ease of pulling through apertures and structures
• 
• We are professional comapny supplying ductile iron casting for our customers. We can supplying most of ductile iron castings, following list are the materials which we usually supplying.

• Material	Rm/MPa(min)	Rp0.2/MPa(min)	A/% (min)	GPa (min)	HBW
  QT350-22L	350	220	22	169	≤160
  QT350-22R	350	220	22	169	≤160
  QT350-22	350	220	22	169	≤160
  QT400-18L	400	240	18	169	120~175
  QT400-18R	400	250	18	169	120~175
  QT400-18	400	250	18	169	120~175
  QT400-15	400	250	15	169	120~180
  QT450-10	450	310	10	169	160~210
  QT500-10	500	360	10	169	170~230
  QT500-7	500	320	7	169	170~230
  QT550-5	550	350	5	172	180~250
  QT600-3	600	370	3	174	190~270
  QT700-2	700	420	2	176	225~305
  QT800-2	800	480	2	176	245~335
  QT900-2	900	600	2		280~360

  
  Mechanical properties and main matrix structure of ductile iron castings attached samples:

  Material	Casting thickness (mm)		Ra/MPa (min)	Rp0.2 /MPa (min)	A% (min)	GPa (min)	HBW
  	>	≤
  QT350-22A		30	350	220	22	169	≤160
  	30	60	330	210	18
  	60	200	320	200	15
  QT400-15A		30	400	250	15	169	135~175
  	30	60	390	250	14
  	60	200	370	240	11
  QT400-18A		30	400	250	18	169	135~175
  	30	60	390	250	15
  	60	200	370	240	12
  QT450-10A		30	450	310	10	169	170~210
  	30	60	420	280	9
  	60	200	390	260	8
  QT500-7		30	500	320	7	169	180~220
  	30	60	450	300	7
  	60	200	420	290	5
  QT500-10A		30	500	360	10	169	180~220
  	30	60	490	360
  	60	200	470	350
  QT550-5A		30	550	350	5	172	190~240
  	30	60	520	330	4
  	60	200	500	320	3
  QT600-3A		30	600	360	3	174	200~250
  	30	60	600	360	2
  	60	200	550	340	1
  QT700-2A		30	700	420	2	176	250~300
  	30	60	700	400	2
  	60	200	650	380	1
  QT800-2A		30	800	480	2	176	260~320
  	30	60
  	60	200