China Weldless Elevator Links Extensional Links

Description
(1)DH forged elevator links are designed to hang elevators form Top Drive System or Hooks in drilling operation.Read the manual before use elevator links.
(2)Each 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).
(3)All the technical data and properties of elevator links completely conform to the requirements of SY/T5112 and Api Spec 8C. (4)Composition and meaning for elevator links series:
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:

specificationsRating loadsLength(mm)US tonkNDH40403551200DH50504501100DH65655801200DH75756651500DH1001008901500DH15015013501800DH20020018002700DH25025022502700DH35035031503300DH50050045003600DH75075066703660note: (1)1US ton≈8.896kN
(2)The 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
(1)Check the safety working load elevator links prior to use;
(2)Ensure rating elevator links can match with the hook and elevators;
(3)Checked if elevator links of one pair are bundled up together and if the stampde numbers are the same;
(4)Hang 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)
(5)Each 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).
(6)Use elevator links vertically in operation.
(7)Not to overload elevator links(less then dynamic and static load) .
(8)Stop ues elevator links with over wear in the upper or lower surface of two eyes in found.(wear is more than 3mm)
(9)When the temperature is below minus 20ºC,stop use elevator links.
High stress of elevator link(hatched areas are for high stress)
5.Maintenance
(1)Keep elevator links clean;
(2)Coat elevator links with grease for rust,and stored in well-ventilated place;
(3)Check elevator links for crack or over wear prior tu use,stop use any elevator links with crack or over wear.
(4)NDT exanimate elevator links after each operation for safety operation.
(5)Not to repairing or welding elevator links.
6.Transportation and storage
(1)Prevent elevator links form raining.
(2)Keep elevator links away from acids,alkalis,salts and other corrosive substance.
7.Other
(1)We responsible for exchange for maintenance without charge due to the quality for 12 months from elevator links service or 18 months from delivary.
(2)Attached with elevator links are quality certificate,Packing list and usage manual.
(3)Select elevator links in chart.
(4)We can design and manufacture elevator links for field service such as elevator links used at temperature from minus 20ºC to minus 40ºC.