New chart :
About the process of production :
Smelting: Adopting electric stove and blast furnace double
smelting, can control the ingredient and temperature well .
Testing : We test the molten iron by examples , spectrometer spectrometry and manual inspection.
Mixed sand: Use DISA Denmark system
Annealing: The temperature is controlled by computer exactly
Pickled: automatic pickling system
Packing: Use high quality double woven bag , packing few and easy to transport .
Some informations about the black equal sockets:
- Black equal sockets are known as no strong tenacity, no long
service life .
- Through airtight test, the quality can be ensured.
- Make sure there is no leakage on the surface .
- Every black equal sockets must succeed in air tightness test.
Measurement chart of black reducing sockets
|Standard||Thread: ISO 7/1|
|Dimension||ISO 49, DIN 2950,EN10242|
|Chemical property||(C %2.4-2.9), (Si %1.4-1.9), (Mn %0.4-0.65), (P% <0.1), (S%
|Physical property||Tensile strength>=350Mpa,Elongation>=10% Hardness<=150HB|
|Type||Beaded with ribs or banded with ribs|
|Beaded without ribs or banded without ribs|
|Surface||Galvanized/ no galvanized|
|Model||Elbow, Tees, Crosses, Bends, Unions, Bushings, Lateral Braches,
Sockets, Nipples, Hexagon/Round, Caps, Plugs, Locknuts, Flanges
,Side Outlet Tees, Side Outlet Elbows and etc|
|Application||Suitable for pipe connect of steam, air, gas, oil and so on|
|Buyer’s drawings or designs are available|
|Package||Cartons without pallet|
|Cartons with pallet|
|Double woven bags|
|Or as buyer’s requirements|
|Delivery details||According to the quantities and specifications of each order|
|Normal delivery time is from 30 to 45 days after receiving the
A: Which parts it is controled strictly ?
Q: Black equal sockets outlet dimension is from 1/8 "~6".
A: Which part of thread will be regulated ?
Q: Thread diameter, parallelism, angle, tooth type, every part on
thread will be regulated strictly .even each black equal sockets
must be sorted by plug gauge.