Elbow,bend equal /reduce tee,concentric/eccentric reducer , cap,flange
Size
Seamless(SMLS) Elbows : 1/2"-24" ,DN15-DN600
Butt Welded Elbows (seam) :24"-72",DN600-DN1800
Type
LR 30,45,60,90,180 degree SR 30,45,60,90,180 degree
1.0D, 1.5D, 2.0D, 2.5D, 3D,4D,5D,6D,7D-40D.
Thickness
SCH10,SCH20,SCH30,STD SCH40, SCH60, XS, SCH80., SCH100, SCH120, SCH140, SCH160, XXS
Standard
ASME,ANSI B16.9;
DIN2605,2615,2616,2617,
JIS B2311 ,2312,2313;
EN 10253-1 ,EN 10253-2
Material
ASTM
Carbon steel(ASTM A234WPB,,A234WPC,A420WPL6.
Stainless steel(ASTM A403 WP304,304L,316,316L,321. 1Cr18Ni9Ti, 00Cr19Ni10,00Cr17Ni14Mo2, ect.)
Alloy Steel:A234WP12,A234WP11,A234WP22,A234WP5,
A420WPL6,A420WPL3
DIN
Carbon steel:St37.0,St35.8,St45.8
Stainless steel:1.4301,1.4306,1.4401,1.4571
Alloy steel:1.7335,1.7380,1.0488(1.0566)
JIS
Carbon steel:PG370,PT410
Stainless steel:SUS304,SUS304L,SUS316,SUS316L,SUS321
Alloy steel:PA22,PA23,PA24,PA25,PL380
GB
10#,20#,20G,23g,20R,Q235,16Mn, 16MnR,1Cr5Mo,
12CrMo, 12CrMoG, 12Cr1Mo
Pipe Bends, Elbow Fittings, Cross Fittings, Thread Pipe Fittings Cangzhou Weiheng Pipe Industry Co.,Ltd , http://www.czweiheng.com
(2) Eliminating internal fires
Some mines use this method to prevent spontaneous combustion deposits (inside fires or other disasters).
(3) Creating conditions for returning to the mining column
Whether the empty field can be filled in time after the mining house is harvested will directly lead to the mining of the pillar, which will directly affect the balance and balanced production of the third-grade mine. The lead-zinc ore of Fankou, mining tailings on both sides are cement, cement backfilling the pillar horizontal layering method. )
(4) Creating conditions for deep and underwater mining.
Used for deep mining, underwater mining and prevention of impact ground pressure.
What is the purpose of filling the mining law?
(1) Conducting ground pressure management
Use the formed filling body to carry out ground pressure management, use to control the surrounding rock caving and surface subsidence, and create convenient conditions and safe conditions for the mining face, protect the surface buildings, ease large-area ground pressure activities, and resume safe production .