SA210 Gr. A1 Gr. C Multi Rifled Mlr Tube Carbon Steel Boiler Tube

Product Description

Multi-Rifled Seamless Cold Drawn Boiler Tubes For Power Generation and Energy Industry

Rifled tubes are used in heat exchangers and boilers to provide highly energy efficient means of heat transfer. The presence of the internal rifling induces centrifugal forces in the mass flow thereby separating the water from the steam fraction and forcing the water towards the tube wall. As a result of this phenomenon and the increase in internal surface the following advantages accrue:

• Improved heat transfer rate even at higher steam quality levels
• Very good heat transfer even at low mass flux levels
• Reduction in mean metal temperature of the tube wall
• Ability to increase heat transfer rate by optimizing rifling geometry

commodity	Multi-rifled Seamless Steel BoilerTube
Standard	ASTM/DIN/EN/JIS/GB/GOST
material	ASTM A210 Gr.A1, Gr.C,A213 T2,T5,T9,T11,T12,T22,T23,T91,A335 P1,P2,P5,P9,P11,P12,P22,P23,P91,P92,DIN 17175 ST35.8, ST45.8, 15Mo3,10CrMo910,12CrMo195,13CrMo45,
OD	1/2"-48",10mm-1219mm
WT	SCH5,SCH10,SCH20,SCH40,SCH60,SCH80,SCH100,SCH120,SCH160,XXS
Usage	Applies to petroleum, chemical industry, electric power, boiler, high temperature resistant, low temperature resistant, corrosion resistant steamless steel pipe used.
Other test	HY,ET according to request
Length	2-12m as your required
Surface	Black paint as rusty protect, capped ends
Marks	As per customers' requirement (Hard marking or spray marking)
Packing	Standard export sea-worthy package, or as customers' request
Shipment	In bundles, shipped in 20 or 40 feet containers, break bulk vessel acc to QTY and discharge port
Ends	PE,BE
Method	140mm below cold drawn,140mm above hot rolled,273mm above hot expand

 

 

 

 

O.D(mm)	28.58	to	40.64	to	50.80	to	63.50	to	76.20
a(mm)		0.15		0.20		0.25		0.30
O.D.(in)	1.125	to	1.600	to	2.000	to	2.50	to	3.000
a(in.)		0.006		0.008		0.010		0.012

TYPE A Multi-Rifled seamless steel tubes
 

Item		Value		Tolerances
A	Tubes outsider diameter	-	-	a	a
B	Major inside diameter	B=A-(1.11*D*2)	B=A-(1.11*D*2)	a	a
C	Min. inside diameter	-	-	-	-
D	Min.wall thickness	-
E	Number of ribs	-	-	-	-
F	Rib width at the top(circumferiential)	4.78 mm	0.188 in.	Nominal value	Nominal value
H	Specified rib height			+/-0.30 mm	+/-0.012 in.
K	Rib side angle (both sides of the rib)	55^o	55^o	+/-15^o	+/-15^o
L	Rib radius (top and bottom of the rib)	form 0.4 to 2 mm	1/64 to 5/64 in.
M	Pitch(rib lead)	-		+/-3.18 mm	+/-0.125 in.
N	Lead			+/-3.18 * E mm	+/-0.125 * E in.
P	Lead angle	30^o	30^o	Nominal value	Nominal value
S	Rib width at top(longitudinal)	8.28 mm	0.326 in.	+/-1.27 mm	+/-0.050 in.

TYPE B Multi-Rifled seamless steel tubes

Item		Value		Tolerances
B	Tubes outsider diameter	-	-	a	a
C	Major inside diameter	C=B-(1.11*1*2)	C=B-(1.11*1*2)	a	a
D	Number of ribs	-	-	-	-
E	Spicified rib height	-	-	B(1)	B(1)
F	Pitch(rib lead)	-	-	+/-3.18mm	+/-0.125 in.
G	Lead	-	-	+/-3.18*D mm	+/-0.125*D in.
H	Rib width at the top(longitudinal)	5.59 mm	0.220 in.	+/-1.27 mm	+/-0.050 in.
I	Min. wall thickness	-	-	-	-
j	Rib side angle (both sides of the rib)	55^o	55^o	+/-15^o	+/-15^o
M	Min. inside diameter	-	-	-	-
L	Rib radius (top and bottom of the rib)	form 0.4 to 2 mm	1/64 to 5/64 in.
P	Lead angle	30^o	30^o	Nominal value	Nominal value
S	Rib width at top(longitudinal)	3.23 mm	0.127 in.	-	-