8
Connecting Parts
Connecting parts on hanger rods serve for transmission and control of tension forces from piping attachments (clamp, beam) into
the attachment on structure (eyes, pads, brackets). A hanger rod
comprises a bar, two joint attachments and strain elements (if required). Applications with rod deviation below 0.5° and hangers
for piping DN <= 50 can be completed with a single joint only.
Rod assembly with two pairs of connecting elements and threaded eye type 832 – pivot type 850 – is recommended for rods with
deviation exceeding 2.5° for pipe hangers DN => 200.
Rods can be loaded by simple tension only; compression forces
generated during piping lift cannot be transmitted, the same restriction exists for use of horizontal rod to hold lateral forces in
piping. These two situations require application of rigid strut assemblies formed by elements classed in production group 4.
Tabulka 8.1 – Types of hanger rod connecting parts
Type
801
804
814
815
816
821
822
831
832
842
850
Description
Application
Hex nut
Coupling nut
Threaded rod with right-hand thread
Threaded rod with right- and left-hand thread
Threaded rod with right coarse-pitch and right fine-pitch thread
Turnbuckle with right coarse-pitch and right fine-pitch thread
Turnbuckle with right- and left-hand thread
Threaded eye, light
Threaded eye, forged
Clevis with pivot
Pivot
Rod load capacity classification identifies individual permitted
rod loads and uniform connecting dimensions that also relate
to other production groups: 3 – beams, 7 – clamps, 9 – connecting parts. The load capacity class is a number matched with rod
thread diameter and the diameter of pivot, which is compatible
with all parts within the same class. The permitted load interpreted as “load capacity” is determined using the permitted load on
the “weakest” part possible within the entire chain of RH and SH
assemblies.
Note: Permitted load of any specific assembly may be even higher
than the permitted load defined within particular bearing capacity class. However, such applications require verification of individual permitted loads for every part of the assembly.
Retaining nut for locking of rod parts against removal
Element for connection of two rods type 814
Basic element of hanger rod
Element for normal rod straining
Element for fine rod straining
Element for fine rod straining
Element for normal rod straining
Pivot attachment element
Pivot attachment element
Eye attachment element
Connecting element
For a review of load capacity classes refer to Table A.5 on page
A.11 of the catalogue.
Connecting of rods to structure is ensured by means of threaded
eyes type 832 mounted on pivots type 850, further also by means
of threaded clevis type 832 attached to clamp eyes or fixture or
even using nuts and pads type 932. The connecting counterpart
within chain must be rated for identical load class, the pivot-eye
connections allow difference of one degree of load class in case
the capacity of whole connection has been verified.
Straining of hanger rods – all hangers for piping with DN => 80
must enable repeated vertical adjustments, even during operation. This requirement can be met by three different methods:
8.1
8 Connecting Parts
a/ Using nuts on the free end of rod (see attachment type “A” in
Fig. B.6, chapter B, page B.9, or spring attachment type 1x3). This
method is recommended for smaller rod diameters (up to M20),
due to higher frictional moment on face surface of nuts, which
exceeds the required tightening torque multiple times, especially
the static one needed for nut “stripping”. The rod is secured against
rotation (flexible torsion) and loosening of thread in other connecting elements of the rod by means of a pair of locking nuts
placed the closest to the strain element possible. This pair can be
used to fix the rod torsion.
b/ Using a turnbuckle and the pair of left-right (L-P) thread in rods.
Rotation of the turnbuckle initiates simultaneous screwing of
both left and right thread into/from the nut, resulting in extension
(shortening) of the rod assembly. This method is suitable for any
rod diameter. However, the values of tightening torque required
are relatively high, as the left-right thread assembly creates a double ratio compared to single thread. The torque for lifting is 20–
50 % higher than the value required for lowering. If the rod length
on one end of turnbuckle exceeds 200 ×
, where M refers to
thread diameter, we recommend using a pair of locking nuts as
described under item a/. Tensioning of spring hanger rods using
a built-in turnbuckle is done by screwing of right-hand thread rod
only, the left-hand thread inside spring is spinning free.
c/ Using a turnbuckle with a pair of right-hand thread with coarse
and fine pitch. Rotation of the turnbuckle advances the bar
threads in the same direction, yet with differential equal to the
difference of their pitch values. Unlike for classic L-P tensioners,
the torque values for lifting and lowering are 20 to 50 % lower,
depending on rod load. The system is suitable for rod hangers or
as a secondary tensioner for spring hangers (supplementary to
tensioner built-in). This method is recommended for rods with
diameter exceeding M24.
Rods are connected on long assemblies, where 2 to 3 metres long
rods would be insufficient. Thread rods type 814 are connected
by means of nut type 824 with its length three times the nominal diameter of thread. These rods must be screwed into the nut
symmetrically and to the full depth, verification is enabled via seethrough opening in the centre of nut. Normal nut must be further
secured with locking nuts on both ends. The coupling nut is not
designed for rod length adjustment and may not be used in this
manner!
8.2
uM
Screwed connections are usually secured against loosening by
means of locking nuts. Locking nuts may not be tightened using
excessive torque, as that would create local tensile stress in bolt
(rod) beyond indication abilities and these stresses may result in
significant reduction of rod load capacity. For tightening procedure refer to installation description on page 8.11.
8
Connecting Parts
Nut Type 801, Coupling Nut Type 804
Coupling Nut Type 804
e
e
Nut Type 801
s
m
A
Application
A nut with coarse right-hand metric thread for attachment of
threaded roads or securing them against removal.
Material
Steel grade 8 according to ISO 898-1.
Surface treatment
Standard galvanizing A3K according to ISO 4042.
Hot-dip galvanizing according to ISO 1461 must be specified in
the purchase order specification.
Application
A nut with coarse right-hand thread for joining of threaded roads
type 814 of greater lengths. The rods screw-in depth must exceed
the dimension A.
Material
Steel grade 8 according to ISO 898-1.
Surface treatment
Standard galvanizing A3K according to ISO 4042.
Hot-dip galvanizing according to ISO 1461 must be specified in
the purchase order specification.
Marking
Marking
Type
s
A
L
Size
Type
Size
801
M
Note: The M marking code does not include thread pitch specification.
804
M
Note: The M marking code does not include thread pitch specification.
Dimensions (mm)
Dimensions (mm)
Size
M
m
e
s
m (kg)
Size
M
L
A
e
s
m (kg)
10
12
16
20
24
30
36
42
48
56
64
72
80
10
12
16
20
24
30
36
42
48
56 × 4
64 × 4
72 × 4
80 × 4
8.4
10
13
16
19
24
29
32
38
45
50
55
62
17.8
20
26.8
33
39.6
50.9
60.8
71.3
82.6
93.6
104.9
121
133
16
18
24
30
36
46
55
65
75
85
95
105
115
0.01
0.02
0.03
0.06
0.10
0.23
0.39
0.65
0.97
1.43
2.0
2.7
3.5
10
12
16
20
24
30
36
42
48
56
64
72
80
10
12
16
20
24
30
36
42
48
56 × 4
64 × 4
72 × 4
80 × 4
30
36
48
60
72
90
108
126
144
155
175
200
220
10
10
15
20
25
30
35
40
45
55
65
75
80
17.8
20
26.8
33
39.6
50.9
60.8
71.3
82.6
93.6
104.9
121
133
16
18
24
30
36
46
55
65
75
85
95
105
115
0.03
0.04
0.10
0.19
0.32
0.7
1.3
2.2
3.5
4.9
6.7
9.0
11.8
8.3
8 Connecting Parts
Threaded Rod Type 814
M
Threaded Rod Type 814
L
Application
Connecting element for hangers featuring rolled continuous
right-hand thread. Dimensions M36 to M80 match thread lengths
2 × M + 150 mm on both ends. Available either in precise lengths
as required or dimensions rounded up to multiples of 250 mm.
Material
Steel grade 8.8 according to ISO 898-1 for temperatures exceeding -40 °C, material A320 L7 for temperatures below -40 °C.
Surface treatment
Standard galvanizing A3K according to ISO 4042.
Hot-dip galvanizing according to ISO 1461 must be specified in
the purchase order specification.
Marking
Type
Size
Length
814
M
L
Note: The M marking code does not include thread pitch specification.
Dimensions (mm) and permissible loads
8.4
Size
M
10
12
16
20
24
30
36
42
48
56
64
72
80
10
12
16
20
24
30
36
42
48
56 × 4
64 × 4
72 × 4
80 × 4
L
(mm)
Configuration m (kg)
Continuous
thread
1 000
End threads
0.5
0.7
1.3
2.0
2.9
4.7
6.8
9.4
13.4
17.5
23.1
29.5
36.8
L
(mm)
Configuration m (kg)
Continuous
thread
2 000
End threads
1.0
1.4
2.6
4.0
5.8
9.4
13.6
18.8
26.8
35
46.2
59
73.6
L
(mm)
Configuration m (kg)
Continuous
thread
3 000
End threads
1.5
2.13
3.9
6.0
8.7
14.1
20.4
28.2
40.2
52.5
69.3
88.5
110.4
Fp (kN)
5.18
7.53
14.0
23.4
33.7
53.5
78
131
172
250
333
405
508
8
Connecting Parts
Threaded Rod Type 815, Threaded Rod Type 816
Threaded Rod Type 815
Threaded Rod Type 816
LL
Coarse Right
MR
MF
MR
ML
Fine Right
LR
LF
LR
L
L
Application
Connecting and tensioning element for rods with right and left
rolled threads. For connection of turnbuckle type 822 with pivoted clevis or thread eye.
Application
Connecting and tensioning element of rods with coarse right and
fine right rolled threads. For connection of turnbuckle type 821
with pivoted clevis or thread eye.
Material
Steel grade 8.8 according to ISO 898-1 for temperatures exceeding -40 °C, material A320 L7 for temperatures below -40 °C.
Material
Steel grade 8.8 according to ISO 898-1 for temperatures exceeding -40 °C, material A320 L7 for temperatures below -40 °C.
Surface treatment
Standard galvanizing A3K according to ISO 4042.
Hot-dip galvanizing according to ISO 1461 must be specified in
the purchase order specification.
Surface treatment
Standard galvanizing A3K according to ISO 4042.
Hot-dip galvanizing according to ISO 1461 must be specified in
the purchase order specification.
Marking
Marking
Type
Size
Type
Size
815
M
Note: The M marking code does not include thread pitch specification.
816
M
Note: The M marking code does not include thread pitch specification.
Dimensions (mm) and permissible loads
Dimensions (mm) and permissible loads
Size
M
L
(mm)
LR
(mm)
LL
(mm)
m
(kg)
Fp
(kN)
10
12
16
20
24
30
36
42
48
56
64
72
80
10
12
16
20
24
30
36
42
48
56 × 4
64 × 4
72 × 4
80 × 4
150
250
250
250
350
350
500
500
500
550
550
600
600
40
70
70
70
80
80
120
160
160
180
180
200
200
60
80
100
120
140
160
180
200
240
260
280
300
300
0.10
0.18
0.33
0.50
1.02
1.65
3.5
4.7
6.0
10.6
13.9
19.2
23.7
5.18
7.53
14.0
23.4
33.7
53.5
78
131
172
250
333
405
508
Size
MR
MF
L
(mm)
LR
(mm)
LF
(mm)
12
16
20
24
30
36
42
48
56
64
72
80
12
16
20
24
30
36
42
48
56 × 4
64 × 4
72 × 4
80 × 4
12 × 1.25
16 × 1.5
20 × 1.5
24 × 2
30 × 2
36 × 3
42 × 3
48 × 3
56 × 3
64 × 3
72 × 3
80 × 3
250
250
250
350
350
500
500
500
550
550
600
600
70
70
70
80
80
120
160
160
180
180
200
200
80
100
120
140
160
180
200
240
260
280
300
300
m
Fp
(kg) (kN)
0.18
0.33
0.50
1.02
1.65
3.5
4.7
6.0
10.6
13.9
19.2
23.7
7.53
14.0
23.4
33.7
53.5
78
131
172
250
333
405
508
8.5
8 Connecting Parts
Turnbuckle Type 821
Turnbuckle Type 821
MF
MR
Application
Connecting and tensioning element with coarse and fine right
thread. For connecting of threaded rods type 814 and 816.
ØD
TW
Material
Steel S355J2 for temperatures exceeding -40 °C, material 20 CrNiMo for temperatures below -40 °C.
A
B
F
L
Surface treatment
Standard galvanizing A3K according to ISO 4042.
Hot-dip galvanizing according to ISO 1461 must be specified in
the purchase order specification.
Marking
Type
Size
821
M
Dimensions (mm) and permissible loads
Size
MR
MF
D
L
d
F
A
B
TW
m (kg)
Fp (kN)
12
12
12 × 1.25
20
125
3
11
15
47
18
0.2
7.53
16
16
16 × 1.5
25
170
4
15
20
65
24
0.4
14.0
20
20
20 × 1.5
33
200
5
18
22
78
30
0.8
23.4
24
24
24 × 2
40
255
6
20
24
103
36
1.6
33.7
30
30
30 × 2
50
255
6
25
30
97
46
2.5
53.5
36
36
36 × 3
60
295
8
30
36
111
55
4.2
78
42
42
42 × 3
70
300
8
30
42
108
65
5.8
131
48
48
48 × 3
85
355
10
35
50
128
75
10.8
172
56
56 × 4
56 × 3
95
400
10
35
60
140
85
14.5
250
64
64 × 4
64 × 3
105
420
12
35
70
140
95
18
333
72
72 × 4
72 × 3
125
440
12
40
80
140
105
28
405
80
80 × 4
80 × 3
130
460
15
45
90
140
115
30
508
Note: Apertures with diameter “d” serve for inspection of mounting (internal pair of openings) and minimum (end pair of openings)
screwing. “TW” refers to the size of wrench for tightening.
8.6
Connecting Parts
Turnbuckle Type 822, Threaded Eye Type 831
Material
Steel S355J2 for temperatures exceeding -40 °C, material 20 CrNiMo for temperatures below -40 °C.
ML
B
MR
Application
Connecting and tensioning element for rods with right and left
threads. For connection of threaded rods bar type 814 and rightleft bar type 815.
d1
A
F
Turnbuckle Type 822
E
8
L
Surface treatment
Standard galvanizing A3K according to ISO 4042.
Hot-dip galvanizing according to ISO 1461 must be specified in
the purchase order specification.
Marking
Type
Size
822
M
Dimensions (mm) and permissible loads
Size
M
d1
L
E
12
12
21
125
34
16
16
27
170
42
20
20
34
200
52
24
24
39
255
60
30
30
45
255
74
36
36
55
295
40
42
45
63
300
50
48
48
80
355
65
Note: The table shows nominal thread diameter M = MR = ML.
F
A
B
m (kg)
Fp (kN)
16
20
24
28
34
86
104
135
40
55
65
80
85
100
115
125
45
60
70
95
85
95
100
105
0.2
0.4
0.7
1.2
1.8
3.0
4.8
7.6
9.3
17.7
27.0
39.2
62.5
91
125
165
Threaded Eye Type 831
A
Application
Connecting element for connecting of pipe clamps up to DN50
and load up to 0.5 kN.
L
Material
Steel S235JR.
Ød
Surface treatment
Standard galvanizing A3K according to ISO 4042.
M
Marking
Type
Size
831
M
Dimensions (mm)
Size
M
d
L
A
m (kg)
10
12
10
12
11
13
36
40
30
35
0.05
0.08
8.7
8 Connecting Parts
Threaded Eye Type 832
Threaded Eye Type 832
G
Material
Steel S355J2 for temperatures exceeding -40 °C, material 20 CrNiMo for temperatures below -40 °C.
F
B
Application
Forged eye for connection of threaded rod and clamp pivot or
connection to structure. It is possible to select pivot diameter one
degree larger that the nominal eye size (thread diameter).
E
A
d1
Surface treatment
Standard galvanizing A3K according to ISO 4042.
Hot-dip galvanizing according to ISO 1461 must be specified in
the purchase order specification.
M
D
Marking
Type
Size
832
M
Dimensions (mm) and permissible loads
8.8
Size
M
A
E
D
d1
F
B
G
m (kg)
Fp (kN)
12
16
20
24
30
36
42
48
56
64
72
80
12
16
20
24
30
36
42
48
56 × 4
64 × 4
72 × 4
80 × 4
33
44
58
72
88
100
110
120
140
160
200
220
60
75
90
110
127
140
157
180
200
230
250
280
24
30
35
44
50
60
70
80
80
90
100
120
17
25
28
35
42
47
52
62
62
72
82
92
6
10
10
15
17
20
25
30
35
40
50
50
25
40
45
55
65
75
85
85
100
125
130
130
19
26
35
44
54
62
72
78
90
100
115
135
0.1
0.2
0.4
0.8
1.2
2.0
2.9
4.7
9.8
14.2
23.8
33.5
8.2
15.1
23.3
32.3
51.0
64.6
85.3
113
170
230
340
440
Connecting Parts
Clevis with Pivot Type 842
Clevis with Pivot Type 842
G
F
ØK
A
E
Application
A forged pivoted clevis for connection of threaded rod and clamp
eye or structure welding attachment. The pivot is secured in place
using washers and cotter pins. Parts attached to the pivot must be
within the same load capacity class as the clevis, with respect to
the diameter of opening and connection band thickness.
Ød1
8
Material
Clevis – steel S355J2 for temperatures exceeding -40 °C, material
CrNiMo for temperatures below -40 °C.
Pivot – steel C35E+QT for temperatures exceeding -40 °C, material
CrNiMo for temperatures below -40 °C.
D
M
Surface treatment
Standard galvanizing A3K according to ISO 4042.
Hot-dip galvanizing according to ISO 1461 must be specified in
the purchase order specification.
Marking
Type
Size
842
M
Dimensions (mm) and permissible loads
Size
12
16
20
24
30
36
42
48
Clevis
M
12
16
20
24
30
36
42
48
A
20
30
35
45
50
60
70
85
E
70
80
90
110
130
150
170
180
D
25
33
40
46
51
61
72
83
d1
12
16
20
24
33
40
45
50
F
12
17
20
22
27
32
37
44
G
34
45
59
68
80
93
111
130
K
24
32
46
53
64
80
90
100
Pivot
d1 × L
m (kg)
Fp (kN)
12 × 50
16 × 58
20 × 76
24 × 85
33 × 104
40 × 118
45 × 142
50 × 162
0.2
0.4
1.0
1.6
2.7
4.4
7.2
10.4
8.8
15.1
24.5
37.4
66
97
128
170
8.9
8 Connecting Parts
Clevis with Pivot Type 843
Clevis with Pivot Type 843
G
F
K
A
E
Ød1
R
Application
Machined pivoted clevis for connection of threaded rod with
clamp eye or the structure top welding attachment. The pivot is
secured in place using washers and cotter pins. Parts attached to
the pivot must be within the same load capacity class as the clevis,
with respect to the diameter of opening and band connection
thickness.
Material
Clevis – steel S355J2 for temperatures exceeding -40 °C, material
CrNiMo for temperatures below -40 °C.
Pivot – steel C35E+QT for temperatures exceeding -40 °C, material
CrNiMo for temperatures below -40 °C.
M
D
Surface treatment
Standard galvanizing A3K according to ISO 4042.
Hot-dip galvanizing according to ISO 1461 must be specified in
the purchase order specification.
Marking
Type
Size
843
M
Dimensions (mm) and permissible loads
Size
56
64
72
80
8.10
Clevis
M
56 × 4
64 × 4
72 × 4
80 × 4
A
60
65
80
90
E
215
230
240
260
D
100
110
120
140
d1
60
70
80
90
F
56
64
70
75
G
120
140
160
180
K
140
160
180
200
Pivot
d1 × L
m (kg)
Fp (kN)
60 × 180
70 × 206
80 × 210
90 × 220
15
19
23
35
207
282
380
480
8
Connecting Parts
Pivot Type 850
Pivot Type 850
L
L1
Ød
Material
Steel C45E+N nebo C35+QT podle EN 10083.
ØD
p
Ødh11
Application
Connecting pivot with washers and cotter pins for clevises type
842, 843 and clamps of types 723, 733, 744.
Surface treatment
Standard galvanizing A5J according to ISO 4042.
Marking
Type
Size
850
d
Dimensions (mm)
Size
d
d1
D
L
L1
Cotter pin
m
(kg)
12
16
20
24
30
36
42
48
56
64
72
80
12
16
20
24
33
40
45
50
60
70
80
90
3.2
4
5
6.3
8
8
10
10
10
10
10
10
24
30
37
44
60
72
85
92
105
115
140
160
57
70
90
100
118
134
162
184
202
230
235
245
40
52
67
72
85
95
115
135
148
175
185
185
3.2 × 20
4 × 25
5 × 30
6.3 × 40
8 × 50
8 × 56
10 × 63
10 × 71
10 × 80
10 × 90
10 × 100
10 × 120
0.05
0.10
0.23
0.37
0.84
1.35
2.07
2.94
4.58
7.05
9.47
12.44
8.11
8 Connecting Parts
Installation
Installation
Rod thread screwing depths
Hangers should be assembled with rods in vertical position, with
no preclination of rods from the vertical. It shall be applied in exceptional cases only, where the design condition of maximum rod
declination of 4° cannot be met. The rods are preclined by means
of displacement of the top hanger attachment or clamp diplacement along the pipe axis.
Threaded rods are available in various lengths with additions
rounded up to 0.25 m, to achieve precise length as required, rods
need to be shortened to a specific length measured during erection. Any cutting must be done with a grinder. The cut surfaces
must be treated with zinc coating.
Z1
The thread screwing depth will be re-inspected prior to final tightening of all retaining nuts on the relevant rod. Retaining nuts are
tightened manually, using spanners, to the torque specified in
table 8.1.
Turnbuckles type 821 are tightened using a spanner. Turnbuckles
type 822 can be tightened using a spanner or wrench.
Cotter pins on all pivots must be opened properly after installation.
Connecting of rods by means of coupling nuts type 804 is the
only method acceptable.
Sufficient adjustment of rod length requires loosening the turnbuckle retaining nut and using the other retaining nut (usually on
the top end of rod) to create a nip pair to accommodate the reaction torque. The thread on turnbuckle must be lubricated using
a MoS based agent. Retaining nuts will be tightened again after
adjustment.
Table 8.1 – “Z” values of screwing depth (mm) and tightening torques for locking nuts (Nm)
8.12
M
Z1min
Z1max
Z2
Mp
12
16
20
24
30
36
42
48
56 × 4
64 × 4
72 × 4
80 × 4
5
5
5
10
10
20
20
20
20
20
25
25
15
15
15
20
20
30
30
30
30
30
35
35
45
60
70
95
85
95
100
105
140
140
140
140
2.0
5.0
10
18
35
50
100
150
200
200
250
300
Retaining nut
Retaining nut
Z3
Coupling nut
Retaining nut
Any assembly procedures must proceed with due care and all
threads on rods on every element must be screwed into nuts to
their full height. The rod thread on coupling nuts must be visible
in the nut inspection aperture.
Once all the hanger elements have been assembled, the rod will
be tightened using nuts to take the piping weight. The load chain
will be tensioned using a turnbuckle inside the block of spring.
The top attachment type “A” (see the review of assemblies in part B
of the catalogue) can be strained using nuts above the top square
washer.
Eye / Clevis
Retaining nut
Z2
Turnbuckle
Retaining nut
Z1
Pivot / Bolt