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Kee Klamp Technical Specifications

The Kee Klamp Fittings

The simple but effective engineering principle of the Kee Klamp Fitting is the foundation of the most versatile pipe connection system available.There are many variations of fitting to suit wide-ranging applications, providing the versatility to achieve virtually any structural configuration.Kee Klamp fittings are generally made from cast iron* and are manufactured to the requirements of EN 1562 & EN 1563 and galvanized to the requirements of EN ISO 1461.

A range of fittings to suit eight sizes of pipe is available. A simple hexagon key is the only tool required to create a strong, rigid joint. A recessed set screw tightened by the hexagon key, firmly locks the pipe into the fitting. The set screw is generally manufactured in case hardened steel* and benefits from Kee KoatTM protection against corrosion.

A Kee Klamp fitting (size 5 to 9) can support an axial load of *2000 lbs (900 kg). per set screw with the set screw tightened to a torque of 29 lbs. ft. (39 Nm).

* Materials used can vary according to application. Please refer to manufacturer for detailed specification.

Sizing Chart

Kee Klamp

Tube Diameter Nominal Bore
Size Outside Diameter
(O/D) (in)
Inches
2 1-7/32″ 1/4″
3 1-1/16″ 3/8″
4 2-7/32″ 1/2″
5 1″ 3/4″
6 1-5/16″ 1″
7 1-5/8″ 1-1/4″
8 1-7/8″ 1-1/2″
9 2-3/8″

2″

Specifying Kee Klamp Fittings

The information on fittings in this site is comprehensive, and because of the coding system we have adopted, easy to use.

Diagrams are shown for each fitting showing entry of tube/pipe, a table of dimensions and a definition of use adjacent to its appropriate Type number (10, 15, 20, 25 etc.).

Alongside the Type number is a code (4, 5, 6, 7, etc.) relating to the outside diameter of the tube/pipe for which the Kee Klamp had been designed. The relationship between the Kee Klamp tube/pipe reference and standard tube/pipe outside diameter is explained in the aforementioned chart.

Example: (1) A 10-7 is a Type 10 Kee Klamp fitting with both sockets designed to accept a tube/pipe that has an outside diameter of 42.4mm or 1-11/16″ (1 1/4″ Nominal Pipe Size). (2) A 25-9 is a Type 25 Kee Klamp fitting with all three sockets designed to accept a tube/pipe that has an outside diameter of 60.9mm or 2-3/8″ (2″ N.P.S.).

Where more than one tube/pipe reference is shown alongside a particular Type number, it indicates that the individual sockets are designed to accept different sizes of tube/pipe. In a multi-digit code number, the first figure relates to the ‘A’ socket and the second to the ‘B’ socket. Example (3) A 45-76 is a Type 45 Kee Klamp fitting with ‘A’ socket accepting a tube/pipe that has an outside diameter of 42.4mm or 1 11/16″, and a ‘B’ socket accepting a tube/pipe that has an outside diameter of 33.7mm or 1-11/32″.

While Kee Klamp can give a general guidance relating to the use of each Kee Klamp fitting detailed in this site, the nature of the product means that the ultimate responsibility for selecting the correct fitting for an application must lie with the customer.

The customer should also ensure that the existing structure to which the Kee Klamp construction is being secured, is of sufficient strength to support both the self-weight of the Kee Klamp construction and the imposed loads applied, including wind loads, snow loads, and any other superimposed loads.

Beam Load Table

For uneven load distributions or single spans, the required pipe size must be determined by standard bending moment calculations assuming a Kee Klamp joint to give a simply supported beam. The table shown below gives an indication only of the safe load uniformly distributed, in lbs., that may be carried per shelf consisting of front and back tubes when used as continuous beams. Recommended set screw torque: 29lbs./ft.

At loads greater than 2023 lbs., consideration must be given to set-screw slip.

BEAM LOAD TABLE (lb)
KK FITTING Size 5 Size 6 Size 7 Size 8 Size 9  
SIZE OF PIPE ¾” IPS 1″IPS 1¼” IPS 1½” IPS 2″ IPS  
SCHEDULE 40 40 40 40 40  
SPAN   SPAN
1′ 1658 3123 5516 7669 13180 1′
2′ 829 1562 2758 3834 6590 2′
3′ 553 1041 1838 2556 4393 3′
3′ 6″ 474 892 1576 2191 3766 3′ 6″
4′ 414 781 1379 1917 3295 4′
4′ 6″ 368 694 1226 1704 2929 4′ 6″
5′ 332 625 1103 1534 2636 5′
5′ 6″ 302 568 1003 1394 2396 5′ 6″
6′ 277 520 919 1278 2197 6′
6′ 6″ 255 481 849 1180 2028 6′ 6″
7′ 237 446 788 1096 1883 7′
7′ 6″ 221 417 735 1023 1757 7′ 6″
8′ 207 390 690 959 1648 8′
9′ 184 347 613 852 1464 9′
10′ 166 313 551 767 1318 10′
Table reflects a safety factor of 1.67:1

Upright Load Table

This table gives an indication only of the safe load, in lbs., that may be carried between the above restraints by single Schedule 40 pipe, 30000 PSI, when used as uprights. Loads listed under ‘A’ columns refer to those loads that are obtainable according to schematic ‘B’. Schematic ‘B’ details a racking system that is mechanically affixed to the surface on which it stands, whereas Schematic ‘A’ details a free-standing racking system. Recommended screw torque: 29 lbs./ft.

UPRIGHT LOAD TABLE (lb )
KK FITTING Size 5 Size 6 Size 7 Size 8 Size 9  
 PIPE SIZE ¾” IPS 1″ IPS 1¼” IPS 1½” IPS 2″ IPS  
Schedule 40 40 40 40 40  
Length A B A B A B A B A B Length
1′ 0″ 1868 2045 3243 3390 4445 4635 5238 5403 7738 7975 1′ 0″
1′ 3″ 1633 1855 2958 3183 4213 4445 4955 5235 7398 7635 1′ 3″
1′ 6″ 1420 1633 2673 2958 3875 4213 4650 4955 7160 7443 1′ 6″
1′ 9″ 1213 1493 2375 2705 3630 3948 4395 4730 6785 7160 1′ 9″
2′ 0″ 995 1283 2108 2480 3335 3715 4138 4500 6448 6843 2′ 0″
2′ 3″ 840 1058 1813 2245 3048 3470 3883 4268 6210 6685 2′ 3″
2′ 6″ 700 953 1583 2020 2753 3273 3570 4003 5848 6355 2′ 6″
2′ 9″ 603 823 1395 1780 2505 2993 3243 3730 5575 6063 2′ 9″
3′ 0″ N/A 700 1220 1583 2170 2703 2985 3523 5180 5835 3′ 0″
3′ 3″ N/A 635 1078 1435 1993 2563 2698 3283 4863 5520 3′ 3″
948 1288 1810 2283 2418 3083 4525 5270 3′ 6″
N/A 1160 1643 2085 2250 2858 4218 4978 3′ 9″
N/A 1025 1488 1938 2065 2603 3880 4818 4′ 0″
1313 1783 1880 2393 3675 4503 4′ 3″
1215 1643 1698 2225 3303 4218 4′ 6″
N/A 1488 1560 2098 3123 3958 4′ 9″
N/A 1363 1450 1920 2918 3675 5′ 0″
N/A 1270 N/A 1785 2693 3415 5′ 3″
N/A 1698 2523 3268 5′ 6″
N/A 1520 2398 3088 5′ 9″
N/A 1450 2150 2918 6′ 0″
2048 2715 6′ 3″
1878 2578 6′ 6″
N/A 2398 6′ 9″
N/A 2263 7′ 0″
N/A 2150 7′ 3″
N/A 2048 7′ 6″
Table reflects a safety factor or 2:1 N/A 1913 7′ 9″

Vibration Test Report

TEST REPORT: Vibration of Kee Klamp Assemblies

Exhaustive tests on samples of standard size 7 Kee Klamp fittings were performed by an independent research laboratory. The purpose of the test was to evaluate the use of either standard set-screws or self-locking set screws.

Test Arrangement
A “Tee” section test assembly was made using three 300mm lengths of galvanized 1¼” standard pipe held together by a socket Tee fitting (Type 25-7). The vertical leg of the test assembly was supported in a standard railing flange (Type 62-7). The completed assembly was then rigidly attached to the vibration table.

The test assembly was initially assembled using standard set screws and tested in the configuration. The standard set screws were then replaced with self-locking set screws and the tests repeated.

Test Procedure
The test was conducted on a Ling 667 kg Electromagnetic vibration table.

The table was programmed to perform a resonance search between 25 and 350 Hz. The following table details the resonant frequencies that were recorded.

During the resonance search amplification factors, Q, were measured at each resonant frequency, the point of reference being the end of one horizontal pipe. The table was then held at one of the resonant frequencies, set in motion with a controlled acceleration level of 4g, and run for a period of six hours. This was repeated for three more resonant frequencies in descending order of “Q” factor.

Resonance
Frequencies Q Factor Running Time
74 1.27 0
106 1.27 0
158 1.53 6 hours
200 1.8 6 hours
221 5 6 hours
295 9 6 hours

During the twenty-four hours of vibration at the four resonant frequencies above no signs of loosening with either type of set screw occurred.

 

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