Customization: | Available |
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Type: | Seamless |
Technique: | Cold Drawn |
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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:
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 |
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) | 55o | 55o | +/-15o | +/-15o |
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 | 30o | 30o | 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) | 55o | 55o | +/-15o | +/-15o |
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 | 30o | 30o | Nominal value | Nominal value |
S | Rib width at top(longitudinal) | 3.23 mm | 0.127 in. | - | - |