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API Product  >> Links >>Elevator Links
Elevator Links
Elevator Links

⑴DH forged elevator links are designed to hang elevators form Top Drive System or Hooks in drilling operation.Read the manual before use elevator links.
⑵Each elevator link of one pair is forged form one single billet of high strength alloy steel,heat treated,surface-strengthen-treated and NDT for super performance and long service.The rating loads of elevator links series are 40t(355kN)-750t(6670kN).
⑶All the technical data and properties of elevator links completely conform to the requirements of SY/T5112 and Api Spec 8C.
⑷Composition and meaning for elevator links series:
Elevator Link

2.Structural Principle
Elevator links can work in pairs. The elevator link upper eye is used for the hook link ear, and the elevator link lower eye is used 
for the elevator.

3.Technical Specification
Chart for thchnical specifications of DH elevator link series:

specifications Rating loads Length(mm)
US ton kN
DH40 40 355 1200
DH50 50 450 1100
DH65 65 580 1200
DH75 75 665 1500
DH100 100 890 1500
DH150 150 1350 1800
DH200 200 1800 2700
DH250 250 2250 2700
DH350 350 3150 3300
DH500 500 4500 3600
DH750 750 6670 3660
note: ①1US ton≈8.896kN
          ②The elevator links of the specifications in this chart are manufactured by our company, other specifications our customer required can be defined in contract.

4.Usage and operation
⑴Check the safety working load elevator links prior to use;
⑵Ensure rating elevator links can match with the hook and elevators;
⑶Checked if elevator links of one pair are bundled up together and if the stampde numbers are the same;
⑷Hang the bigger eyes of elevator links to hook,and engage elevator ears to smaller eyes of elevator links,and insert safety pins of elecators to assure safety.(Note:The bended ends of the lower eyes shall be inward)
⑸Each elevator links have been strictly tested in workshop.Exanimate elevator links for crack after each operation(it is recommedded that the NDT shall be carried out every three months or after each operation),for high stress areas of the elevator links shall conform to specifications of JB 4730 and other areas shall conform to specifications Ⅲ.When crack is found,the use of elevator links should be prohibited.And the results of the NDT should be recorded for traceability(see high stress of elevator links).
⑹Use elevator links vertically in operation.
⑺Not to overload elevator links(less then dynamic and static load) .
⑻Stop ues elevator links with over wear in the upper or lower surface of two eyes in found.(wear is more than 3mm)
⑼When the temperature is below minus 20℃,stop use elevator links.

High stress of elevator link(hatched areas are for high stress)
High stress of elevator link

⑴Keep elevator links clean;
⑵Coat elevator links with grease for rust,and stored in well-ventilated place;
⑶Check elevator links for crack or over wear prior tu use,stop use any elevator links with crack or over wear.
⑷NDT exanimate elevator links after each operation for safety operation.
⑸Not to repairing or welding elevator links.

6.Transportation and storage

⑴Prevent elevator links form raining.
⑵Keep elevator links away from acids,alkalis,salts and other corrosive substance.

⑴We responsible for exchange for maintenance without charge due to the quality for 12 months from elevator links service or 18 months from delivary.
⑵Attached with elevator links are quality certificate,Packing list and usage manual.
⑶Select elevator links in chart.
⑷We can design and manufacture elevator links for field service such as elevator links used at temperature from minus 20℃ to minus 40℃.

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