Galvanized Seamless Rectangle Steel Pipe
Jointless hollow section with a zinc coated surface in schedule wall thicknesses
Specifications
Seamless Steel Pipe, Steel Pipe
Large Diameter Heavy Wall Seamless Steel Pipe
Big bore heavy wall seamless pipe for high pressure headers manifolds and mechanical bores
This is seamless steel pipe ordered at the top of the size table, a long pipe of steel with a hollow section and no joint around it, produced at large outside diameter and heavy wall. It is specified by pressure vessel shops, manifold builders and machining houses that need SCH100, SCH140, SCH160 or XS wall, or a wall anywhere up to 80mm, in bores that run out to 48 inch. Buying the large end of the range from the same source as the ordinary schedules removes the situation where a project finds a stockist for most of the line but has to place the two heavy wall spools somewhere else.
- Product Name — Seamless Steel Pipe Big Diameter Thickness
- Also Known As — Large diameter heavy wall seamless tube
- Material — A53 Gr. A, Gr B, A106 GR.A GR.B, A333 GR1 GR3 GR6, S355JR, S355JO, 355J2
- Outside Diameter — 1/2 inch to 48 inch, from 21.3mm, or customized
- Heavy Wall Schedules — SCH100, SCH140, SCH160, XS
Why It Is Specified
Key Benefits of Seamless Steel Pipe Big Diameter Thickness
Wall Thickness Carried All the Way to 80mm
Heavy schedules SCH100 SCH140 SCH160 and XS are standard, and a customized wall up to 80mm is produced where no schedule fits the design calculation.
Bore Sizes Out to 48 Inch
The outside diameter table runs from 21.3mm right out to 48 inch, so a large header or casing does not have to be rolled and welded from plate.
Thick Wall Without a Longitudinal Seam
A heavy wall welded pipe puts a long seam in the highest stress region. The seamless route gives a hollow section with no joint around it at the same thickness.
Machining Stock Built Into the Order
Heavy wall seamless is often bought as a hollow bar substitute. Ordering the wall thickness directly avoids boring a solid bar and throwing the swarf away.
Cold Service Grades at Heavy Wall
A333 GR1 GR3 and GR6 are available in the same table as A53 and A106, so a heavy wall line running at low temperature is covered by one enquiry.
Coated and Insulated Before Shipment
Black painted, galvanized, natural, anticorrosive 3PE coated and polyurethane foam insulated finishes are applied at the mill, which matters more on heavy sections that are awkward to handle twice.
Problems It Solves
What This Material Removes From Your Process
Heavy Wall Items Left Unsourced on a Package
Most stockists stop around SCH80. Carrying SCH100 SCH140 SCH160 and XS means the whole piping package can be closed on one purchase order.
Rolling and Welding Plate to Get a Large Bore
A rolled and welded section puts a longitudinal seam through the wall. Seamless production at large diameter delivers a hollow section with no joint around it.
Boring Solid Bar for Hollow Components
Machining a bore out of solid bar consumes cutting time and turns material into swarf. A heavy wall tube close to the finished dimensions removes most of that work.
Design Wall That Sits Between Two Schedules
When the calculated wall falls between SCH140 and SCH160, a customized wall anywhere up to 80mm can be produced instead of paying for the next schedule up.
Handling Heavy Sections Twice for Coating
Thick wall pipe is heavy to move. Applying paint, galvanizing, 3PE or polyurethane foam insulation before shipment avoids a second lift at a coating yard.
Application Scenarios
Where It Is Used
High Pressure Manifolds and Headers
SCH160 and XS wall sections used where the design pressure pushes past what standard schedule pipe will hold.
Hollow Bar and Machining Blanks
Heavy wall pipe bought as a bored blank for cylinders, bushes, sleeves and rolls instead of drilling out solid bar.
Casing and Conductor Sections
Large outside diameter heavy wall pipe used as casing, sleeve and conductor sections in drilling and civil works.
Boiler and Power Plant Pipework
Thick wall A106 Grade B runs in steam and feedwater service inside power generation plants.
Low Temperature Heavy Wall Lines
A333 GR1 GR3 and GR6 sections in refrigeration, LPG and cold climate duty where wall thickness and impact toughness are both specified.
Structural Piles and Heavy Columns
S355JR S355JO and 355J2 large diameter sections carrying axial load in industrial structures and marine works.
Who It Is For
Buyers Who Specify This Product
- Pressure vessel and manifold fabricators buying SCH160 or XS wall sections for high pressure assemblies
- Machining shops sourcing heavy wall pipe as hollow bar for cylinders sleeves and bushes
- Power plant maintenance engineers replacing thick wall steam and feedwater runs
- Drilling and civil works contractors ordering large diameter casing and conductor sections
- Project buyers filling the two or three heavy wall line items a piping package always leaves unsourced
- Stockists adding large diameter heavy wall seamless to a schedule range that stops at SCH80
Technical Data
Specifications and Technical Features
Values below come from the product data published by Shandong Tianyu Metal Products. Confirm the exact grade and size against your order.
| Product Name | Seamless Steel Pipe Big Diameter Thickness |
|---|---|
| Also Known As | Large diameter heavy wall seamless tube |
| Material | A53 Gr. A, Gr B, A106 GR.A GR.B, A333 GR1 GR3 GR6, S355JR, S355JO, 355J2 |
| Outside Diameter | 1/2 inch to 48 inch, from 21.3mm, or customized |
| Heavy Wall Schedules | SCH100, SCH140, SCH160, XS |
| Full Schedule Range | SCH5S, SCH10S, SCH20S, SCH20, SCH30, STD, SCH40, SCH60, SCH80, SCH100, SCH140, SCH160, XS |
| Wall Thickness | 1.65mm - 80mm or customized |
| Length | 5.8m, 6m Fixed, 12m Fixed, 2-12m Random or customized |
| Surface Treatment | Black painted, galvanized, natural, anticorrosive 3PE coated, polyurethane foam insulation |
| Manufacturing Route | Seamless, no welded joint around the section |
| Place of Origin | China |
| Certificate | Mill test certificate |
Technical Features
- Large outside diameter seamless pipe from 21.3mm out to 48 inch
- Heavy wall schedules SCH100 SCH140 SCH160 and XS available as standard
- Full schedule ladder from SCH5S SCH10S SCH20S SCH20 SCH30 STD SCH40 SCH60 and SCH80
- Wall thickness 1.65mm to 80mm or customized between schedules
- Material A53 Gr A and Gr B A106 GR.A and GR.B A333 GR1 GR3 GR6 S355JR S355JO 355J2
- Length 5.8m and 6m fixed 12m fixed or 2-12m random or customized
- Surface black painted galvanized natural anticorrosive 3PE coated or polyurethane foam insulated
- Hollow section with no joint around the circumference
Materials
- ASTM A106 Grade A and Grade B for heavy wall pressure service
- ASTM A53 Grade A and Grade B for general heavy section duty
- ASTM A333 GR1 GR3 and GR6 for low temperature heavy wall lines
- S355JR S355JO and 355J2 for large diameter structural sections
Certification
- ISO9001
- BV
- SGS
- RoHS
- Mill test certificate supplied with each shipment
Manufacturing
How It Is Made and Processed
Billet heating and piercing to open the hollow shell
Elongating and hot rolling to the large outside diameter
Sizing to the heavy wall schedule or the customized wall dimension
Straightening and wall thickness verification across the section
Cutting to 5.8m 6m 12m fixed or 2-12m random length
End facing bevelling where ordered
Coating painting galvanizing or foam insulation then bundling for export
Quality Control
Checks Before It Ships
- Wall thickness measured at several points around the circumference on heavy sections
- Outside diameter and ovality checked against the ordered size
- Mill test certificate issued against the ordered A53 A106 A333 or S355 grade
- Straightness checked after cutting on long heavy wall lengths
- Coating and insulation condition inspected before loading
- Bundle weight and count reconciled with the packing list
Customization
What We Can Change on Your Order
- Wall thickness produced to a customized dimension anywhere up to 80mm where no schedule matches
- Outside diameter customized beyond the standard 1/2 inch to 48 inch table
- Cut length set to 5.8m 6m 12m fixed or 2-12m random
- Bevelled ends prepared for field girth welding on heavy wall sections
- Surface system chosen from black paint galvanizing natural 3PE or polyurethane foam insulation
- Grade selected from the A53 A106 A333 or S355 families for the design temperature
Comparison
Seamless Steel Pipe Big Diameter Thickness Against the Alternatives
| Rolled and welded plate cylinder | A seamless heavy wall section has no joint around it, so there is no longitudinal seam running through the thickest and most stressed part of the wall. |
|---|---|
| Solid round bar bored on a lathe | Heavy wall pipe arrives with the bore already there, so machining time and swarf are both cut down on cylinders sleeves and bushes. |
| Standard schedule seamless pipe | SCH100 SCH140 SCH160 and XS carry pressures that SCH40 and SCH80 will not, and a wall up to 80mm can be produced when even SCH160 is short. |
| Large diameter spiral welded pipe | Spiral pipe reaches bigger diameters at thin wall, while this product is the route when the same bore needs a thick seamless wall. |
Use Guide
Specifying Handling and Welding Notes
- Quote the calculated wall thickness in millimetres as well as the nearest schedule so the closest match inside the 1.65mm to 80mm range can be produced
- Order bevelled ends on heavy wall sections because on site edge preparation on thick material is slow
- Preheat according to your welding procedure when joining heavy wall carbon sections
- Allow for the lifting weight at site before choosing 12m fixed lengths in the heaviest walls
- Name the design temperature so the A333 grades are offered where the service needs them
- Request the mill test certificate and the dimensional report together when the pipe will be machined to a finished bore
Questions Buyers Ask
Seamless Steel Pipe Big Diameter Thickness FAQ
What is the thickest wall you can supply?
Wall thickness runs to 80mm. SCH100, SCH140, SCH160 and XS are standard, and a customized wall between those steps can be produced when the design calculation needs it.
How large can the outside diameter go?
The standard table runs from 1/2 inch, which is 21.3mm, out to 48 inch. Sizes outside that are handled as a customized enquiry.
Can I use heavy wall pipe instead of hollow bar for machining?
Yes, that is a common use. Give us the finished bore and outside diameter plus your machining allowance and we will suggest the nearest wall inside the 1.65mm to 80mm range.
Do you supply heavy wall pipe already bevelled?
Yes. Bevelled ends can be prepared before shipment, which saves the slow job of preparing a thick edge on site.
Is the low temperature grade available at heavy wall?
A333 GR1, GR3 and GR6 are in the same material list as A53 and A106 and can be ordered across the schedule range.
What lengths do heavy wall sections come in?
5.8m and 6m fixed, 12m fixed or 2-12m random. Check your site lifting capacity before choosing 12m in the heaviest walls.
Can the pipe be shipped coated or insulated?
Black painted, galvanized, natural, anticorrosive 3PE coated and polyurethane foam insulated finishes are all applied before loading.
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