Assembly instructions for swivel mechanical joints Bondstrand fiberglass pipe series

Transcription

1 Assembly instructions for swivel mechanical joints Bondstrand fiberglass pipe series Scope These instructions describe the proper procedures for the installation of Bondstrand Swivel mechanical joints. Swivel mechanical joint Introduction This guide provides recommendations for the installation of Bondstrand piping systems using the Swivel mechanical joint. Many of the skills, techniques and principles of steel pipe installation also apply to Glassfiber Reinforced Epoxy (GRE) piping. In general Bondstrand GRE piping weighs much less than steel and is more flexible, but it must be handled more carefully than uncoated and unlined carbon steel pipe. In addition GRE pipe often needs protection against abrasion at points of support. To accommodate the characteristics of GRE piping; the following installation recommendations should be followed. You are encouraged to contact NOV Fiber Glass Systems or your NOV Fiber Glass Systems representative for more help on specific problems or questions. Check the presence and quality of the joint material (O-rings) and equipment (photo 1). The tooling and joint material listed below are, as a minimum, required to make a Swivel joint. All items are available from NOV Fiber Glass Systems. Installation equipment like cranes are to be determined by installation contractor. Tooling 1. Lubricant 6. Torque wrench 2. O-ring and screw driver 7. Spanner 3. Lugs 8. Pullers 4. Band clamps 9. Socket 5. Rag

2 Joint assembly Bring the pipes into position. The alignment of the pipes is important. Clean the grooves and sealing surface of the male and female pipe end, using a clean dry rag. Clean the O-rings with water or a clean rag. Check O-rings for damages and correct size. 2

3 Distribute the O-ring evenly in the groove by slipping a screwdriver under it and sliding the screwdriver around the joint. Be careful not to damage the O-ring. A sound O-ring is the key to a watertight joint. Lubricate the outside of the male end, and the inside of the female end. Motor oil or Teflon based lubricant can be used. Put the band clamps with the lugs into position, make sure there is some protection (e.g. rubber sheet) between the band clamp and the pipe surface. Apply the pullers to the lugs. 3

4 Pull the joint until no gap between both parts is left. Mount the split rings (half flange rings) to both ends of the joint. Make sure the adjacent pairs of split rings are rotated (approximately 60 degrees) relative to each other. Place the bolts and hand tighten all nuts. Bolt threads must be clean and lubricated to attain proper torque. Use lubricated washers under nuts to protect ring back face. Tighten all nuts following the sequence shown under tightening sequence. Before tightening, make sure the orientation of the connected fitting is correct. Do not succeed the torque increments given in Recommended bolt torques. After the bolts have been tightened to recommended torque, recheck the torque on each bolt in the same sequence, since previously tightened bolts may have relaxed. 4

5 Assembly of Swivel joint finished. Recommended bolt torques Pipe Size Initial torque Torque full pressure seal 12 inch 100 Nm 450 Nm Tightening sequence

6 Safety Wear suitable protective clothing, gloves, shoes and eye protection when it is necessary. Important notice This literature should only be used by personnel having specialized training in accordance with currently acceptable industry practice. Variations in environment, changes in operating procedures, or extrapolation of data may cause unsatisfactory results. National Oilwell Varco has produced this brochure for general information only, and it is not intended for design purposes. Although every effort has been made to maintain the accuracy and reliability of its contents, National Oilwell Varco in no way assumes responsibility for liability for any loss, damage or injury resulting from the use of information and data herein. All applications for the material described are at the user s risk and are the user s responsibility. All brands listed are trademarks of National Oilwell Varco. North America South America Europe Asia Pacific Middle East San Pedro Avenue Estrada de Acesso à Zona P.O. Box 6, 4190 CA No. 7A, Tuas Avenue 3 P.O. Box Suite 200 Industrial Portuária de Suape, s/no. Geldermalsen, The Netherlands Jurong, Singapore Dubai, UAE San Antonio, TX USA Recife, PE, Brazil Phone: Phone: Phone: Phone: Phone: fgspipe@nov.com 2012 National Oilwell Varco. All rights reserved. INS2008 supersedes FP November 2012