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kwik-ZIP®

kwik-ZIP HD series


Inert Centralizer and Spacer Systems for the Drilling
and Civil Construction Industry


Installation Guide for HD Series (HD 30, HD 50, and HD 75)
for Welling Casing, Screen, Pump Riser,
and Pipeline Cased Crossing Applications, etc.

 

Product Selection Guide

The table below details Model details and Maximum Operating Temperatures:

Model and Bow Height
Max Operating Temperature
Recommended for Use
on Pipe Diameter
HD 30 (1 3/16")
176° F
4" Nominal (4.33" OD and above)
HD 50 (2")
HD 75 (3")

All HD Series Centralizers / Spacers incorporate rubber grip pads under the collars to prevent slippage on the pipe.

Installation Instructions

The chart below indicates the number of HD series kwik-ZIP® centralizer segments required and the approximate setting position for various pipe diameters.

Size Table and Setting Guide - HD Series

Nominal Pipe Size
(NPS)
Outside Diameter of Pipe (inches)
Suggested Number
of Segments*
Approximate Setting
Guide Position
4.33
2
0
4
4.50
2
15
4.5
5.00
2
30
5
5.563
2
55
6.30
2
85
6
6.625
3
5
7.09
3
20
7.87
3
40
8
8.625
3
65
9.84
4
25
10
10.75
4
45
12
12.75
4
80
14
14.00
5
50
16
16.00
6
35
18
18.00
6
65
20
20.00
7
55
24
24.00
8
65
25.59
9
50
27.95
9
70
31.50
10
75
35.43
12
60
39.37
13
65
47.24
17
45
55.12
20
45
62.99
22
50

*NOTE: For heavy pipe installed in the horizontal position (e.g. Cased Crossings), it is recommended that the number of bows be maximized to support maximum load per spacer.

Use the following formula to calculate the number of segments per spacer for such heavy pipe:

Number of Segments = [Pipe OD (in.) x 3.1428] ÷ 180.
(Round the result down to nearest whole number.)

CAUTION: kwik-ZIP® centralizers should not be exposed to a naked flame or sparks from welding. Failure to shield the product whilst welding may result in damage to the centralizer.

Bow configuration on large diameter heavy weight pipe
Example of bow configuration on large diameter heavy weight pipe.

For heavy weight pipe and diameters greater than those listed, the following formula may be used to calculate the number of segments required. This will maximize the number of bows supporting the pipe for heavy loads.

Where: D = Outside Diameter of Casing (inch)

Where: N = Number of kwik-ZIP® centralizer segments,

For heavy weight pipe: N = [D x (22/7)] ÷ 180

Setting Guide Position (refer to Size and Setting Guide)

Setting Guide position diagram

Step 1 - When you have established the appropriate setting guide position (see table), place the segments on a flat surface and insert the male section of each segment into the screw housing on the next segment (as indicated by the arrows in the above diagram).

Step 2 - Line the leading edge of each screw housing up with the appropriate number on the Setting Guide.

Step 3 - Once all settings are set, they can be wrapped around the pipe and the final joints can be fastened. This method allows the centralizer to be made up mostly by hand.

A flat screwdriver of approximately 5/16" is required to tighten the screws once the segments are fixed to the pipe.

Important Note: Do not over-tension the screws as this may cause damage to the thread.

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kwik-ZIP being installed
2 x HD 30 segments installed on 4" stainless steel pipe
2 x HD 30 segments installed
on 4" Stainless Steel pipe

kwik-ZIP