Materials
Carbon, low-temperature carbon, high-yield carbon and alloy steels to ASTM, EN and IS grades, and the standards, facings and finishes we make to.
Grades and typical use
Choose the group for the service, then the grade. Ask if you need a grade that isn’t listed.
[CONFIRM: grades supplied: delete any we don’t make or trade]
Carbon steel
ASTM A105 A105, A105N
General service, from ambient to elevated temperatures
Carbon steel plate
IS 2062 E250
Plate flanges
Low-temperature carbon steel
ASTM A350 LF2 Class 1, LF3
Low-temperature service. LF2 Class 1 is impact-tested at −46 °C.
High-yield carbon steel
ASTM A694 F42, F46, F52, F56, F60, F65, F70
High-pressure transmission pipelines, matched to API 5L line pipe grades
Alloy steel
ASTM A182 F1, F5, F9, F11, F12, F22, F91
High-temperature service in power and refining
EN and DIN grades
EN 10222-2 P245GH, P250GH (C22.8)
Flanges to EN 1092-1 and DIN
Standards and pressure ratings
Sizes from ½" to 24" NB. Where we publish dimension tables, the standard links to them.
[CONFIRM: each standard and rating]
EN 1092-1
DN 15 to DN 600; PN 6 to PN 100
No tables published yet
BS 4504
Not stated
No tables published yet
BS 10
Tables D, E, F and H
No tables published yet
JIS B2220
5K to 20K
No tables published yet
IS 6392
Not stated
No tables published yet
Facings
Sections through the flange face, bore on the left. Mating pairs are drawn apart.
[CONFIRM: facings offered]
Raised face (RF)
Flat face (FF)
Ring type joint (RTJ)
Tongue and groove (T&G)
Male and female (M&F)
Face finish: Standard serrated finish, 3.2 to 6.3 µm Ra (125 to 250 µin). Smooth finish on request. [CONFIRM: face finish]
Protective finishes
- Rust-preventive oil
- Black anti-rust paint
[CONFIRM: finishes offered]
Documents, inspection and marking are on the quality page.