- ASTM A333 Gr.6 LOW-Temp Seamless Steel Pipes for CANADA GAS PLANT PROJECT
- Size: 33.4mm-610mm
Qty: 1280 Tons
- ASTM 252 GR.50 LSAW Steel Pipe for Texas City Harbor (Piling)
- Size: 1350-1650*19-44mm
Qty: 460 Tons
GALVANIISED MALLEABLE FIITTIINGS
Blackheart Malleable Iron castings.
DIMENSIONS generally to ASME B16.3 or JIS
天天捕鱼B2301, depending on manufacturing source. JIS B2301
dimensions are generally considered to be
天天捕鱼corresponding values to BS143 and BS1256, although
天天捕鱼some sizes are not exact equivalents.
THREADING is BSP pipe thread, to BS.21 (AS 1722, Part 1).
The specification for BS 143 fittings is:
天天捕鱼Taper External (Series R) Taper Internal (Series RC)
The specification for BS 1256 fittings is —
天天捕鱼Taper External (Series R) Parallel Internal (Series RP) Our stock fittings are usually BS 143 taper/taper, as
this is believed to offer superior sealing characteristics due to greater thread contact (refer illustration below).
Taper/taper threads are also being specified by increasing numbers of Gas Authorities, for the same
WORKING PRESSURES (except flanges)
天天捕鱼Recommended maximum working pressures are 1379 kPa for water and 1034 kPa for steam, air, gas and oil.
NOTE: Working pressures may also be limited by
天天捕鱼relevant Pressure Piping Codes or Industry regulations.
天天捕鱼When ordering Reducing Sockets, Nipples, Bushes and Elbows, always state largest size first —
e.g. 80 x 40 bush.
天天捕鱼When ordering 3- or 4- way fittings, the sizing sequence illustrated below should be adopted
ALTERNATIVE THREADING天天捕鱼 to special order.
NPT (API linepipe threads) Taper Internal/Taper
External can be supplied for fittings to American
NOTE天天捕鱼: Locknuts and Plain Sockets without ribs, are
天天捕鱼supplied with parallel threads.
Hot Dip Galvanised is the standard finish for stock.
Fittings shall be subject to an internal hydraulic pressure of 2068 kPa without showing any sign of
天天捕鱼leakage or abnormality.
BLACK AND GALVANIISED STEEL FIITTIINGS
Screwed Steel Pipe fittings are designed for use with “Medium” and “Heavy” pipes to AS
天天捕鱼1074. These BS EN 10241 fittings are the recognised Standard for Medium Pressure
Screwed Pipework. Tubular items in this range conform to AS 1074
BS EN 10241 Steel Threaded Pipe Fittings, Screwed BSP Thread”.
Australian Standard 1074 “Steel Tubes and Tubulars Threaded or suitable for Threading with Pipe Threads of Whitworth Form”. Australian Standard 1650 “Galvanised Coatings on Ferrous Articles”.
Tubulars: These are manufactured from tubing made in accordance with AS 1074 from steel with 0.06 max sulphur and 0.06 max phosphorus.
Machined Fittings: These are manufactured to dimensions in BS EN 10241:2000 and generally made
from “Free Cutting Steel”.
天天捕鱼1. Black Steel: These fittings are generally degreased and protected with a coating of light oil.
天天捕鱼2. Zinc Protective Coating: Fittings may be supplied zinc plated using the Electrolytic Zinc Coating
process on finished Black Fittings.
3. Hot Dip Zinc Galvanising: Galvanising of fittings shall be performed before the thread cutting
operation, by means of the hot dip method.
4. Zinc Flake: Fittings may be supplied Zinc Flake Coated. This process being performed on Finished