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Products & Services
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Mill Sales

Large Diameter Pipes

Mannesmann Line Pipe, part of the Salzgitter group, is a leading specialist for longitudinally HFI-welded steel tube and pipe in a wide range of dimensions and grades.

+ Mannesmann Linepipe Website

Mannesmann Line Pipe uses the high-frequency induction (HFI) resistance pressure welding technique for longitudinal welding. Our production sites in Siegen and in Hamm supply products to customers around the globe.

  • Structural tubes

  • Oil and gas linepipe

  • Water linepipe

  • Oilfield tubulars (OCTG)

  • District heat pipes

  • Multi-certified tubes and pipes

  • Boiler tubes and tubes for equipment

Material Supplied acc. to EN10219 or EN10210

Large Diameter Pipes Stock

Circular
Square and Rectangular

Circular Large Diameter Pipes

Outside Diameter
NW
mm
DN
Inch
Wall thicknesses in millimetres / inches
3.20
3.60
4.00
4.50
5.00
5.60
6.35
7.13
8.00
8.38
8.74
9.53
10.3
11.1
11.9
12.7
14.3
15.9
17.5
19.1
20.6
22.2
23.8
25.4
0.126
0.142
0.157
0.177
0.22
0.22
0.25
0.281
0.315
0.33
0.344
0.375
0.408
0.438
0.469
0.5
0.562
0.625
0.688
0.75
0.812
0.875
0.938
1
114.3
100
4.5
8.77
9.83
10.9
12.2
13.5
15
16.9
18.8
117.5
4.625
9.02
10.1
11.2
12.5
13.9
15.5
17.4
19.3
139.7
125
5.5
10.8
12.1
13.4
15
16.6
18.5
20.9
23.2
26
159.0
6.25
12.3
13.8
15.3
17.1
19
21.2
23.9
26.7
29.8
31.1
32.4
35.1
37.8
40.5
43.2
45.8
168.3
150
6.625
13
14.6
16.2
18.2
20.1
22.5
25.4
28.3
31.6
33
34.4
37.3
40.1
43
45.9
48.7
177.8
7
13.8
15.5
17.1
19.2
21.3
23.8
26.8
30
33.5
35
36.4
39.5
42.5
45.6
48.7
51.7
193.7
7.625
15
16.9
18.7
21
23.3
26
29.3
32.8
36.6
38.3
39.9
43.3
46.6
50
53.4
56.7
203.0
8
15.8
17.7
19.6
22
24.4
27.3
30.8
34.4
38.5
40.2
41.9
45.5
48.9
52.5
56.1
59.6
216.8
8.5
16.9
18.9
21
23.6
26.1
29.2
33
36.9
41.2
43.1
44.8
48.7
52.5
56.3
60.1
63.9
71.4
217.8
8.5
16.9
19
21.1
23.7
26.2
29.3
33.1
37
41.4
43.3
45.1
48.9
52.7
56.6
60.4
64.2
71.8
219.1
200
8.625
17
19.1
21.2
23.8
26.4
29.5
33.3
37.3
41.6
43.5
45.3
49.3
53
56.9
60.8
64.6
72.2
229.0
9
17.8
20
22.2
24.9
27.6
30.9
34.9
39
43.6
45.6
47.5
51.6
55.6
59.6
63.7
67.7
75.7
244.5
9.625
21.4
23.7
26.6
29.5
33
37.3
41.7
46.7
48.8
50.8
55.2
59.5
63.9
68.3
72.6
81.2
273.0
250
10.75
23.9
26.5
29.8
33
36.9
41.8
46.7
52.3
54.7
57
61.9
66.7
71.7
76.6
81.5
91.2
100.8
323.9
300
12.75
31.6
35.4
39.3
44
49.7
55.7
62.3
65.2
67.9
73.9
79.7
85.6
91.6
97.5
109
121
132
144
154
339.7
13.375
33.1
37.2
41.3
46.1
52.2
58.5
65.4
68.5
71.3
77.6
83.7
90
96.2
102
115
127
355.6
350
14
34.7
39
43.2
48.3
54.7
61.3
68.6
71.8
74.8
81.3
87.7
94.3
101
107
120
133
146
159
170
183
195
207
382.0
15
46.5
52
58.8
65.9
73.8
77.2
80.5
87.5
94.4
102
109
116
130
144
157
171
184
197
210
223
406.4
400
16
49.5
55.4
62.6
70.2
78.6
82.3
85.7
93.3
101
108
116
123
138
153
168
182
196
210
225
239
419.0
16.5
57.1
64.6
72.4
81.1
84.9
88.4
96.2
104
112
119
127
143
158
445.0
17.5
60.7
68.7
77
86.2
90.2
94
102
110
119
127
135
152
168
457.2
450
18
62.4
70.6
79.1
88.6
92.8
96.7
105
114
122
131
139
156
173
190
206
222
238
254
270
473.1
18.625
57.7
64.6
73.1
81.9
91.8
96
100
109
118
126
135
144
162
179
508.0
500
20
69.4
78.6
88.1
98.6
103
108
117
126
136
146
155
174
193
212
230
248
266
284
302
530.0
530
20.875
82
91.9
103
108
112
122
132
142
152
162
182
202
221
241
259
278
297
316
559.0
22
86.5
97
109
114
119
129
139
150
161
171
192
213
234
254
274
294
314
334
610.0
600
24
94.5
106
119
124
130
141
152
164
176
187
210
233
256
278
299
322
344
366

Square & Rectangular Hollow Section

Size
mm
Wall thicknesses in millimetres
6.30
7.10
8.00
8.80
10.00
11.00
12.50
14.20
16.00
17.50
20
25.40
250 x 250
49.3
55.5
62.3
68.4
77.4
84.9
96
108.5
121.5
132.2
149.9
260 x 260
49.8
56
62.9
69.1
78.2
85.7
97
109.5
122.7
300 x 200
49.3
55.5
62.3
68.4
77.4
84.9
96
108.5
121.5
132.2
149.9
300 x 250
53.4
60
67.5
74
83.8
92
104
117.6
131.8
143.5
162.8
203.3
300 x 300
58.4
65.6
73.8
81
91.7
100.6
113.9
128.8
144.4
157.3
157.3
157.3
350 x 250
58.4
65.6
73.8
81
91.7
100.6
113.9
128.8
144.4
157.3
178.5
223.4
350 x 350
68.2
76.7
86.2
94.7
107.3
117.7
133.3
150.9
169.3
400 x 200
63.5
71.4
80.3
88.2
99.9
109.6
124.1
140.4
157.4
171.6
194.8
244
400 x 300
68.2
76.7
86.2
94.7
107.3
117.7
133.3
150.9
169.3
400 x 400
78.3
88.1
99
108.8
123.3
135.4
153.4
173.6
194.9
212.6
241.7
303.6
450 x 250
68.2
76.7
86.2
94.7
107.3
117.7
133.3
150.9
16.3
500 x 200
68.2
76.7
86.2
94.7
107.3
117.7
133.3
150.9
169.3
500 x 300
78.3
88.1
99
108.8
123.3
135.4
153.4
173.6
194.9
212.6
241.7
303.6
Salzgitter Mannesmann UK Ltd.
Lower Ground Floor
The Hamlet
Hornbeam Park
Harrogate
North Yorkshire
HG2 8RE
Show on the Map
General:
01423 566660
Sales:
01423 707390
Email:
sales@szuk.co.uk
About Salzgitter Mannesmann UK
The SZAG Group
SALCOS©
Contact Us
Legal
Tax Strategy Publication 2024
SZAG Terms of Trading
Modern Slavery Statement 2024
Supplier Code of Conduct
SZAG Code of Conduct
Stockholding
SMUK Complete Stocklist
Overview
Hollow Section
Heavy Section
Merchant Bar
Galvanised Tube
International Trading
Overview
Mill Sales
Overview
Steel Plate
Steel Beams
Steel Coil
Large Diameter Pipes
Project Management
Overview
Legal
Tax Strategy Publication 2024
SZAG Terms of Trading
Modern Slavery Statement 2024
Supplier Code of Conduct
SZAG Code of Conduct
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