Pak Precise Engineering Pvt Ltd
Transition Fitting Steel to Polyethylene ¾”
Transition Fitting Steel to Polyethylene ¾”
General Specification
General Specification
Steel-to-Polyethylene Transition fitting comprises of Carbon Steel & Polyethylene parts and a mechanical joint design that provides 2 seals plus a resistance to a force on the pipe end equal to or greater than that which will cause permanent deformation of the pipe.
Steel Part
Steel Part
- ERW carbon steel line pipe conforms with the requirement of API 5L Grade-B (latest
edition) - External socket of transition joint is cut from Carbon Steel pipe in accordance with API
5L Grade-B (latest edition) - Electric Welding of external socket of transition joint with Carbon Steel Pipe is in
accordance to API-1104. - Carbon Steel section of the Transition Fitting has grey color external powder
protective coating Corro-Coat PE-F-1307 procured from JOTUN which is suitable
for outdoor above ground application on Natural Gas System and has a minimum
thickness of 120 microns. - 7 tanks Zinc Phosphate Pre-treatment process of steel pipe and the timing of each
process is carried out as recommended by our Powder Coating manufacturer. - 7-Tank Process consists of following:-
1) Degreasing
2) De-rusting (pickling)
3) Rinsing
4) Zinc Phosphating + Toning
5) Rinsing
6) Passivation by chromic acid sealant
7) Drying
Threads on Steel Pipe
Threads on Steel Pipe
The steel pipe of transition fitting has 3/4” BSPT threads (3/4” long) in
accordance with BS-21 with the following characteristics.
- Taper 1deg47’
- Truncation of roots and
crests are rounded - Pitch 1.814mm
- Thread Height 1.162mm
- Thread angle 55deg
Polyethylene Part
Polyethylene Part
Polyethylene pipe of transition fitting is manufactured from Yellow PE-80 resin in accordance with ASTM 2513 (size) and ISO 4437 (raw material.)
O’ Rings
O’ Rings
2qty NITRILE (BUNA-N) O’ Rings are used at 2 ends of transition joint for gas tight and tamper proofing.
Dimensions
Dimensions
Nominal size in inches ¾”
SDR 11
Avg OD inches 1.05
Min WT inches 0.095
Weight lb/ft 0.124
Steel Compression Sleeve Liner
Steel Compression Sleeve Liner
At the transition portion of transition fitting pipe, a steel compression sleeve liner is placed to provide a pullout resistance of 3250N.