Suppliers | Stockists | Exporters of Seamless and Welded Pipes & Tubes
Rolf Engg. Solutions Inc.
Products Offered

Rolf Engg Solutions carries a full range of carbon and alloy pipe in seamless & welded types. Rolf carries a wide range of Carbon & Alloy Steel Pipe with big diameter api pipes & heavy wall api pipes.

ROLF ENGINEERING SOLUTIONS stocks a wide variety of carbon steel & alloy steel pipes & tubes in seamless, welded, erw, efw, efsw, hsaw, dsaw & lsaw types. The grade stocked by Rolf Engg Solutions includes ASTM & API standard grades in various high tensile & critical applications.

API 5L - GRADE B PSL1, X42 PSL1, X46 PSL1, X52 PSL1, X56 PSL1, X60 PSL1, X65 PSL1, X70 PSL1, X80 PSL1, X100 PSL1

API 5L - GRADE B PSL2, X42 PSL2, X46 PSL2, X52 PSL2, X56 PSL2, X60 PSL2, X65 PSL2, X70 PSL2, X80 PSL2, X100 PSL2

ASTM A671/A671M GRADE CA 55, CB 60, CB 65, CB 70, CC 60, CC 65, CC 70

ASTM A672/A672M GRADE A 45, A450, A55, B60, B65, B70, C55, C60, C65, C70



ASTM A106/A106M GRADE A,B & C.

ASTM / ASME A333 / SA333 Grade 1 3 4 6 7 8 9 10 11 – Low Temperature Carbon Steel Seamless Pipes

ASTM A335 GRADE P1, P5, P11, P12, P91

ASTM A691/ASME A691: CM-65, CM-70, CM-75, CMSH-70, CMS-75, CMSH-80, 1/2 CR, 1CR, 11/4 CR,

21/4 CR, 3CR, 5CR, 9CR, 91

ASTM A335/ASME A335: P1, P2, P5, P5b, P5c, P9, P11, P12, P15, P21, P22, P23, P24, P36, P91, P92, P122, P911

ROLF ENGINEERING stocks API & ASTM standard pipes with NACE MR0175, NACE MR0103, HIC, SSC, Offshore Service, Sour Service, SOHIC, SCC certified materials with certifications which include EN 10204 3.1, EN 10204 3.2 etc. the stock ranges includes pipes from around the world with Japanese origin, European Origin, Korean origin, Indian Origin, USA origin, African origin pipes & tubes in seamless, saw, erw, efw, efsw type materials.

Inspection & Testing Service

HIC to NACE MR0175
Sulphide Stress Cracking (SSC)
Ultrasonics to BS/EN/ASME Standards
Charpy Impacts
Through Thickness Tensile (TTT)
Bend Test
Tests on Post World Heat Treated (PWHT) Samples
Elevated Temperature Tests
Re-certification by producing mills
Check Analysis

We also do Third Party Inspection (TPI) with the following : Lloyds, EIL, TUV, SGS, Jacob H & G, Bax Council, Mecon, PDIL, DNV, UDHE, Toyo, GL, BV, Veloci, ABS, BARC, Intertek.

We are able to provide the following material testing services both in-house and by NAMAS approved test houses.

Middle East Asia South America North America Europe Africa
Saudi Arabia Singapore Argentina USA Russia Nigeria
Iran Malaysia Bolivia Canada Norway Algeria
Iraq Indonesia Brazil Mexico Germany Angola
UAE Thailand Chile Panama France South Africa
Qatar Vietnam Venezuela Costa Rica Italy Libya
Bahrain South Korea Colombia Puerto Rica United Kingdom Egypt
Oman Japan Ecuador Trinidan & Tobago Spain Sudan
Kuwait Sri Lanka Guyana Jamaica Ukraine Equatorial Guinea
Turkey Maldives Paraguay Bahamas Netherland The Republic of Congo
Yemen Bangladesh Uruguay Denmark Belguim Gabon
Syria Mayanman Greece
Jordan Taiwan Czech Republic
Cyprus Combodia Portugal


Third Party Inspection

We also do third party inspection with the following : Lloyds, EIL, TUV, SGS, Jacob H & G, Bax Council, Mecon, PDIL, DNV, UDHE, Toyo, GL, BV, Veloci, ABS, BARC, Intertek

We have ready stock available for following brands : API 5L Pipes Tenaris, Dalmine - Italy | API 5L Pipes Nippon Steel & Sumitomo Metal Japan | API 5L Pipes Sumitomo Japan | API 5L Pipes Salzgitter Mannesmann Brazil | API 5L Pipes JFE Steel Corporation Japan | API 5L Pipes Vallourec France | API 5L Pipes Maharashtra Seamless Ltd India | API 5L Pipes Jindal Saw Ltd India | API 5L Pipes Welspun India | API 5L Pipes Mukut Tanks & Vessel Ltd - India | API 5L Pipes Tubacex - Spain | API 5L Pipes ArcelorMital - Romania.

API PSL1 Line Pipe API 5L Offshore Service Welded Pipe
API PSL2 Line Pipe API ERW Pipe
API Seamless Pipe API PSL1 ERW Pipe
API PSL1 Seamless Pipe API PSL2 ERW Pipe
API PSL2 Seamess Pipe API HFW Pipe
API Welded Pipe API PSL1 HFW Pipe
API PSL1 welded Pipe API PSL2 HFW Pipe
API PSL2 Welded Pipe API SAW Pipe
API 5L PSL1 Seamless Pipe API PSL2 SAW Pipe
API 5L PSL1 Welded Pipe API LSAW Pipe
API 5L PSL2 Seamless Pipe API PSL2 LSAW Pipe
API 5L PSL2 Welded Pipe API HSAW Pipe
API 5L Sour Service Pipe API PSL1 HSAW Pipe
API 5L Sour Service Seamless Pipe API PSL2 HSAW Pipe
API 5L Sour Service Welded Pipe API DSAW Pipe
API 5L Offshore Service Pipe API PSL1 DSAW Pipe
API 5L Offshore Service Seamless Pipe API PSL2 DSAW Pipe

API Line Pipes
API Line Pipe is steel pipe used for the transmission of Oil, Gas and Petroleum Distillates.
Line pipes makes the pipeline and is different from casing and tubing
Line Pipes are manufactured as per specifications established by American Petroleum Institute (API). API 5L is a specification of API which defines the standard for the dimension, physical, mechanical and chemical properties of the steel. Several pipe mills around the globe manufacture the API 5L pipes for Oil and Gas industry.

Products Stocked & Supplied:
• Longitudinal Submerged Arc Welded [L-SAW] Pipes
• Helical / Spiral Submerged Arc Welded [H-SAW] Pipes
• Longitudinal with Circumferential Seam Submerged Arc Welded Pipes
• Seamless pipes

StE 210.7US API 5L PSL -1 Germany DIN 17172
Grade Grade
A25 L175 -
A L210 StE 210.7
B L245 StE 240.7
X42 L290 StE 290.7
X46 L320 StE 320.7
X52 L360 StE 360.7
X56 L390 StE3850.7
X60 L415 StE 415.7
X65 L450 StE 445.7
X70 L485 StE 480.7


Material #
EN 10208-2
DIN 17172
StE 240.7
Gr. B
StE 290.7
X 42
StE 360.7
X 52
StE 415.7
X 60
StE 240.7 TM
Gr. B
StE 290.7 TM
X 42
StE 360.7 TM
X 52
StE 415.7 TM
X 60
StE 445.7 TM
X 65
StE 480.7 TM
X 70
X 80


Seamless carbon steel pipe has, as its name implies, no longitudinal weld seam. It is, in essence, one solid homogeneous piece of steel. A solid billet is simply heated and then stretched over a series of mandrels until the pipe has achieved its desired diameter and wall thickness. Typically seamless carbon steel pipe fourteen inches and greater in diameter are rolled from shells which expand the diameter and reduce the wall until the desired dimensions are achieved. Sizes smaller than fourteen inches in diameter are typically stretch reduced whereby the diameter is gradually reduced and the wall relatively increased via a series of rolls. There is also a cold forming process for seamless pipe production, but such manufacturing processes are typically reserved for different alloys. Being that there is no seam, seamless carbon steel pipe is typically used in high pressure applications. Common seamless specs include; API5LB, A106, A333


Early carbon steel pipe producers employed a manufacturing method called butt-welding. The butt-welding process was quite elementary in that it merely rolled a piece of heated steel plate into tubular form and created a longitudinal weld through compression and direct heat. In 1922 the Fetz Moon Tube Company instituted the first continuous weld line where by rolled up coils of steel (again, imagine a toilet paper roll made of steel) could be unrolled, leveled, and continuously fed down a line of rolls which would slowly bend the steel into shape eventually to a point where the ends could be butt-welded. When the mill came to the end of a coil, they could simply weld it to the beginning of the next coil with little interruption to production. As industry called for tighter tolerances and better welds, the continuous butt-weld process gave way to electric resistance welding (ERW). ERW is quite similar to the continuous weld process in that coils of steel are leveled and fed down a line of forming rolls, but that is where the similarities end. During the ERW process the unrolled coils (skelp) are not heated and the longitudinal weld is created by way of an electric current. The weld is then electronically inspected for defects, normalized so as to maintain consistency with the rest of the steel, and cooled. At this point the pipe is sometimes resized and then cut, coated, and or tested to meet the desired specifications. ERW pipe typically holds much tighter tolerances and maintains surface and wall consistency much more than seamless carbon steel pipe. Common ERW specs include; API5LB, A53, and A500


The double submerged arc weld (DSAW) process is similar to that of the ERW process in that coils of carbon steel are unrolled in a continuous ribbon. As the DSAW method of manufacturing is typically used for larger diameter pipe, the method of roll forming the skelp is similar to but not exactly like that of ERW. DSAW pipe is typically either pyramid rolled (three angled OD rolls in the shape of a pyramid form the pipe) or rolled using the U-O-E process (skelp is first subject to a "U" shaped press, followed by a "O" shaped press). The most prominent difference between ERW and DSAW carbon steel pipe is the longitudinal weld. The DSAW arc weld is submerged in a flux media to keep the weld from being exposed to ambient contaminants. Also, both the OD and the ID of the pipe is welded, typically at separate times creating a situation where one weld consumes the other creating a higher quality weld. DSAW carbon steel pipe is easily distinguishable due to its prominent and consistent ID and OD weld seam. Common DSAW specs include; API5l, A252, and A139.


The most easily distinguishable manufacturing method for carbon steel pipe is spiral weld. In this process the weld is created in the exact same manner as that of DSAW, only the weld seam takes on a helical or spiral appearance due to the way the skelp is rolled to form. Just as in the case with the ERW and DSAW process, a continuous ribbon of skelp is leveled and sent through a series of rolls to form. In the case of the spiral weld process a simple three roll bend is typical and thus makes for faster, more efficient, and less costly manufacturing process. The spiral weld process also allows the mill to roll a much wider range of sizes than DSAW or ERW mills. Also, due to its axial symmetry, spiral weld carbon steel pipe has an inherent ability to maintain straightness. Common spiral weld specs include; API5LB and A252.

Application Industry:
Oil and Gas Pipeline
• Cross Country Oil & Gas Pipelines
• Spur Lines
• City Gas Distribution
• Refinery & Petrochemical – High Temperature & Low Temperature Pipes

Power Plant
• Cooling Water Line & Auxiliary Cooling Water Line
• Ash Handling Line

Water & Sewerage
• Distribution and Transmission Lines for Irrigation Systems
• Pipes for Potable Water
• Drainage Pipes

• Piling and Casing Pipes
• Structural Columns

Other Industrial
• Pipes for Fertilizer Plant
• Mining Pipes
• Dredging Pipes
• Air Duct Piping
• High Mast Pipes for Wind Mill Towers

Structural Applications
We supply welded (SAW, ERW/HFI) and seamless tubular and hollow sections suitable for conductor pipe, riser pipe, tendon pipe, jacket members and other structural onshore and offshore applications.

Typical Stock Size Range* (size range might differ based on material grade):
Seamless pipe – 1 ½”- 32” (38.1mm – 812.8mm)
SAW – 18”- 100” (457mm – 2540mm)
ERW – 1” – 26” (33.4mm – 660.4mm)

Process Applications
We provide seamless and welded pipe for onshore, offshore, midstream, power and downstream applications, including line pipe, pipe for high temperature and pressure environments, abrasion resistant and HDPE pipe.

Typical Stock Size Range* (size range might differ based on material grade):
Seamless pipe - ¼”- 32” (13.7mm – 812.8mm)
Welded pipe – ¼” - 100” (13.7mm – 2540mm)

*Larger sizes and project specific dimensions manufactured to order.

Pressure Equipment Directive (PED) and NACE MRO 0103 and MRO 0175 as applicable.

Coating Standard:
• ANSI/AWWA C104/A21.4 American National Standard for Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water
• ISO 21809 Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems
• DIN 30670 Polyethylen coatings of steel pipes and fittings

• square ends (straight cut, saw cut, and torch cut);
• beveled for welding (All line piping is square cut to the tolerance specified and bevelled to ANSI B16.25. An angle of 30º (-0º, +5º) and a landing of 1,6 mm, ±0,8 mm is applied. Schedule 160 material is supplied without bevelling.)

Surface: Lightly oiled, Hot dip galvanized, Electro galvanized, Black, Bare, Varnish coating/Anti rust oil, Protective Coatings (Coal Tar Epoxy, Fusion Bond Epoxy, 3-layers PE)
Packing: Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips, Plastic caps.
Test: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Hardness Test, Blow Test, Impact Test, etc.), Exterior Size Inspection, Hydrostatic Test(The standard pressure is limited to 20,7 MPa (3000 psi)), X-ray Test.
Mill Test Certificate: EN 10204/3.1B
Third party inspection: SGS, BV, Lloyds etc.

Carbon Steel Pipe

Material Specification Grades
EN 10225 S355G15, S460G6
BS 7191 355EM
API 5L Grade B, X42, X52, X56, X60, X65, X70, X80, X100
ASTM A519 SAE 4130, 4140
ASTM/ASME A/SA53 A/SA106 Grade A, B, C
ASTM A252 Grade 2, 3
ASTM/ASME A/SA333 Grade 6


Material Specification Grades
API 5L X52, X56, X60, X65, X70, X80
CSA Z245.1 359, 414, 448, 483
ASTM / ASME A/SA53 Grade A, B
ASTM / ASME A/SA106 Grade B, C
ASTM A252 Class 2, 3
EN 10216-2 Seamless (Material No. WNr) P235GH (1.0345), P265GH (1.0425)
EN 10217-5 Welded (Material No. WNr) P235GH (1.0345), P265GH (1.0425)


Material Specification Grades
EN 10216-3 (Material No. WNr) P215NL (1.0451), P355N (1.0562), P355NH (1.0565), P355NL1 (1.0566), P275NL1 (1.0488), P275NL2 (1.1104), L290NB (1.0484), L360NB (1.0582)
ASTM / ASME A/SA 671/672 Grade 60, 65, 70


High Temperature Seamless Pipe ASTM A 106 Gr B/C, API 5L Gr B, ASTM A 53 Gr B
Heat Exchanger Seamless Tube ASTM A179
Low Temperature Seamless Pipe ASTM A333 Gr 6
Low Temperature Seamless Tube ASTM A334 Gr 6
High Yield Seamless Pipe API 5L Gr. X42/X46/X52/X56/X60/X65/70X/80 PSL-1/PSL-2
High Yield Seamless Pipe ISO 3183 Gr L245, L290, L320, L360, L415, L450, L485
Atmospheric & Low Temp EFW Pipes ASTM A671 Gr. CC60/CC65/CC70
High Pressure & Moderate Temp EFW Pipes ASTM A672 Gr. B60/B65/B70/C55/C60/C65/C70
High Yield ERW / SAW Pipe API 5L Gr. X42/X46/X52/X56/X60/X65/70X/80 PSL-1/PSL-2
High Yield ERW / SAW Pipe ISO 3183 Gr L245, L290, L320, L360, L415, L450, L485




Delivery Condition
Pipe Grade/Steel Grade
As-rolled, normalizing rolled, normalized or normalizing formed
L175 or A25
L175P or A25P
L210 or A
As-rolled, normalizing rolled, thermomechanical rolled, thermomechanical
L245 or B
formed, normalizing formed, normalized, normalized and tempered, or, if
agreed, quenched and tempered for SMLS pipe only.
As-rolled, normalizing rolled, thermomechanical rolled, thermomechanical
formed, normalizing formed, normalized and tempered or
quenched and tempered
L290 or X42
L320 or X46
L360 or X52
L390 or X56
L415 or X60
L450 or X65
L485 or X70
L245R or BR
L290R or X42R
Normalizing rolled, normalizing formed, normalized or normalized and
L245N or BN
L290N or X42N
L320N or X46N
L360N or X52N
L390N or X56N
L415N or X60N
Quenched and Tempered
L245Q or BQ
L290Q or X42Q
L320Q or X46Q
L360Q or X52Q
L390Q or X56Q
L415Q or X60Q
L485Q or X70Q
L555Q or X80Q
L625Q or X90Q
L690Q or X100Q


Germany DIN 17172
EN 10208-2
A25 L175 -      
A L210 StE 210.7   St. 35,8 3059/1-2
B L245 StE 240.7 L 245NB St. 45,8 3059/5-6
X42 L290 StE 290.7 L 290NB    
X46 L320 StE 320.7 L 320NB    
X52 L360 StE 360.7 L 360NB    
X56 L390 StE 385.7 L 390NB    
X60 L415 StE 415.7 L 415NB    
X65 L450 StE 445.7 L 450NB    
X70 L485 StE 480.7 L 485NB    
X80 L555   L 555NB    


ASTM A 53 BS3601 DIN 1629  
Grade A SMLS HFS 22 & CDS 22 St 35 SIS 1233-05
Grade B SMLS HFS 27 & CDS 27 St 45 SIS 1434-05
ASTM A 53 BS3601 DIN 1626  
Grade A ERW ERW 22 Blatt 3 St 34-2 ERW  
Grade B ERW ERW 27 Blatt 3 St 37-2 ERW  
ASTM A 53 BS3601 DIN 1626  
FBW BW 22 Blatt 3 St 34-2 FBW  
ASTM A 106 BS3602 DIN 17175  
Grade A HFS 23 St 35-8 SIS 1233-06
Grade B HFS 27 St 45-8 SIS 1435-05
Grade C HFS 35    
ASTM A 134 BS3601 DIN 1626  
  EFW Blatt 2 EFW  
ASTM A 135 BS 3601 DIN 1626  
Grade A ERW 22 Blatt 3 St 34-2 ERW SIS 1233-06
Grade B ERW 27 Blatt 3 St 37-2 ERW SIS 1434-06
ASTM A 139 BS3601 DIN 1626  
Grade A EFW 22 Blatt 2 St 37  
Grade B EFW 27 Blatt 2 St 42  
ASTM A155 Class 2 BS 3602 DIN 1626, Blatt 3 with Certification C  
C45   St 34-2  
C50   St 37-2  
C55   St 42-2  
KC55 EFW 28 St 42-2  
KC60   St 42-2  
KC65 EFW 28S St 52-2  
KC70   St 52-2  
API 5L BS3601 DIN 1629  
Grade A SMLS HFS 22 & CDS 22 St 35 SIS 1233-05
Grade B SMLS HFS 27 & CDS 27 St 45 SIS 1434-06
API 5L BS3601 DIN 1625  
Grade A ERW ERW 22 Blatt 3 St 34-2 ERW  
Grade B ERW ERW 27 Blatt 4 St 37-2 ERW  
API 5L BS 3601 Double Welded DIN 1626  
Grade A EFW ERW 22 Blatt 3 St 34-2 FW  
Grade B EFW ERW 27 Blatt 4 St 37-2 FW  
API 5L BS3601 DIN 1626  
FBW BW 22 Blatt 3 St 34-2 FBW