Page 13 - HeavyMetal

Process

The hot finish seamless carbon steel & alloy steel division is where high precision mandrel inside the hollow moves along
equipped with latest machineries and all processes are fully with pipe during rolling, which ensures of maintaining precision
automatic with on line ultrasonic & eddy current testing & latest dimensional variation, smooth inside surface finish of
testing facilities for chemical & mechanical testing to meet the elongated shells. These hollow shells are re heated at 900 to
customer requirements. 950°C prior to passing through 24 stand SRM (Stretch
Reducing Mill) where final size, dimension and surface finish
CROSS-ROLL PIERCING-ACCU ROLLING - SRM of HFS tubular product is achieved. Finished tubes / pipes
TECHNOLOGY FOR HFS-HMT UNIT-III undergo various testing as per the specification / customer’s
This is the state-of-the-art manufacturing process for high requirements followed by marking and dispatch.
quality seamless pipes and tubes. All the operational points of
manufacturing involves through closely monitored and
professionally executed, to meet the requirements of clients
and various third party inspection agencies. The raw material MANUFACTURING RANGE
steel round bars selected for HFS tubular products are
ensured within the framework of our stringent internal TDC OD : 4 mm to 168.3 mm
encompassing the specific requirement mentioned In P.O. THK : 0.5 mm to 25 mm
conforming to the highest quality standard. Length : Upto 31 Meters depending upon size

This process begins with heating of round bars steel between
temperature range 1150-1250°C in a rotary hearth furnace
which passes through a cross-roll piercing mill where solid GRADE & SPECIFICATIONS
round bar steel is converted into cylindrical elongated hollow
shells. These hollow shells are passed through accu roll mill ASTM/ASME A/SA 179, 192, 199, 106/53 (Gr. A, B, C), 210
governed by two guided disk monitored by power pack system (Gr. A1, C), A 519, 213 (Gr. T1, T2, T5, T9, T91, T11, T12,
T22), 335 (Gr. P1, P2, P5, P9, P91, P11, P12, P22), 334/333
(Gr. 1, 3, 8, 6), 209 (Gr. T1, T1A, T1B), 556 (Gr. A, B, C) etc.
DIN 17175/2391 (Gr. St35.8, St45.8, St 52, 16 Mo3, 13CrMo44,
10CrMo910), 2448, 1630, BS 3059, 980, 6323, 3602/1,
EN10716-2, 4130, EN 18, P235, P275, P355,1026, 1030 etc.

CAPACITY

75,000 MTPA

Other Specification / Grades can be supplied as per
customer's requirements