Threaded Casing with Short/Long Round Thread or Buttress

 

STANDARD    
   

API Spec 5 CT

DIMENSIONS

O.D.
in         mm

Weight T&C W.T. Steel grade
Lb/ft Kg/m mm H40 J55 K55 N80 L80 C95 P110
4 1/2 114,3 9,5 14,2 5,21 S S S - - - -
    10,5 15,6 5,69 - S;B S;B - - - -
    11,6 17,3 6,35 - S;L;B S;L;B L;B L;B L;B L;B
    13,5 20,1 7,37 - - - L;B L;B L;B L;B
    15,1 22,5 8,56 - - - - - - -
5 127 11,5 17,1 5,59 - S S - - - -
    13 19,4 6,43 - S;L;B S;L;B - - - -
    15 22,3 7,52 - S;L;B S;L;B L;B L;B L;B L;B
    18 26,8 9,19 - - - L;B L;B L;B L;B
    21,4 31,9 11,1 - - - L;B L;B L;B L;B
    23,2 34,6 12,14 - - - L;B L;B L;B L;B
    24,1 35,9 12,7 - - - L;B L;B L;B L;B
5 1/2 139,7 14 20,9 6,2 S S S - - - -
    15,5 23,1 6,98 - S;L;B S;L;B - - - -
    17 25,3 7,72 - S;L;B S;L;B L;B L;B L;B L;B
    20 29,8 9,17 - - - L;B L;B L;B L;B
    23 34,3 10,54 - - - L;B L;B L;B L;B
6 5/8 168,3 20 29,8 7,32 S S;L S;L - - - -
    24 35,7 8,94 - S;L S;L - - - -

where:
            S = Short Round Thread
            L = Long Round Thread
            B = Buttress Thread
Weight per unit calculation formula:
w = (O.D. - W.T.) x W.T. x 0.0246615 (kg/m)
w = (O.D. - W.T.) x W.T. x 10.68 (lb/ft)

STEEL REQUIREMENTS

Steel grade Chemical requirements Mechanical requirements
C Mn Ni Cu P S Si Tensile strength Yield strength Elongation A min.
max. max. max. max. max. max. max.
(%) (%) (%) (%) (%) (%) (%) N/mm2 N/mm2 (%)
H40 - - - - 0,03 0,03 - min. 414 276-552 calculation
J55 - - - - 0,03 0,03 - min. 517 379-552 according
K55 - - - - 0,03 0,03 - min. 655 379-553 to the wall
N80 - - - - 0,03 0,03 - min. 689 552-758 thickness
L80 0,43 1,9 0,25 0,35 0,03 0,03 0,45 min. 655 552-655  
C95 0,45 1,9 - - 0,03 0,03 0,45 min. 724 655-758  
P110 - - - - 0,03 0,03 - min. 724 655-758  

NOTES 

LENGTHS     Range I : 4,88-7,62 meters 
    Range II : 7,62-10,36 meters
    Range III : 10,36-12,00 meters
PROTECTION     Unprotected or external protection
    Each pipe is  provided with plastic protectors at both ends.
MARKING     Die stamped or/and paint stenciled according to standard or
      per customer request.
DELIVERY     In bundles of maximum 2500 kg, tied in minimum four places
    with steel strps.
MILL TEST REPORT     Mill test reports are issued to customer requirements.
    Usually they comply with EN 10204 - 3.1.B (DIN 50049 - 3.1.B)



Another kinds of production