UK Product Handbook 2026 - Volume 2

Pipeline ancillaries Separators and insulation jackets

10

Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2018

TI-P119-07 CMGT Issue 3

Mating Flanges

Description Spirax Sarco mating flange sets are designed to provide a suitable connection upstream and downstream of Spirax Sarco flanged products. They comprise 2 flanges, 2 gaskets and 2 sets of fasteners (bolt, washer and nut). Optional extras Insulation jackets for flanges both low temperature (220 °C) and high temperature (425 °C) are available for sizes: DN15 - DN50 (see TI-P119-01), and a payback calculator is also available (see TI-P119-02).

3 2

2 3

1

1

Slip-on flanges shown

5

5

4

4

7.7.48

Materials No. Part

Material

10.7 49

1

Bolt

Carbon steel

BS 3692 Grade 8.8/DIN 931

BS 3692 Grade 8/DIN 931 - Zinc plated up to M20 Self colour above M20

2

Nut

Carbon steel

BS 4320 Form A - Zinc plated up to M20 Self colour above M20

3

Washer

Carbon steel

4

Gasket

Non-asbestos fibre

BS 7531 Grade X Type A or B

BS 4504 (DIN)

ASTM A181 Gr. 60

ANSI B 16.5

ASTM A105N

5

Flange

Forged carbon steel

BS 970 070 M20 BS 1503 221/430 ASTM A181 Gr. 60

BS10

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