4100mm Heavy and Wide Plate
4100mm plate
heavy plate 200mm

4100mm Heavy and Wide Plate

Name: China 4100mm Heavy and Wide Plate Manufacturers Suppliers Factory - Customized Service - OCTAL Pipe
Brand: OCTAL
SKU: 284767760

Product: 4100mm heavy & wide steel plate
Size: width ≤ 4100 mm, thickness 6–200 mm, custom length
Use: energy, offshore modules, pressure vessels, heavy structures
Line: reheating → descaling → 4-high rolling → MULPIC → 9-roll levelling → air cooling
Features: extra-wide (fewer welds), high flatness, accurate dimensions
Supplier: Octal Pipe (export documents, 3rd-party inspection available)

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Product Introduction

Modern energy and offshore projects increasingly require extra-wide, high-flatness plates to reduce longitudinal weld seams, speed up module fabrication, and guarantee predictable mechanical performance. Octal Pipe's 4100mm heavy and wide plate offering is developed exactly for that purpose: to supply plates up to 4100mm in width and up to 200mm in thickness from a dedicated, fully stepwise-connected production line equipped with MULPIC accelerated cooling and 9-roll hot levelling.
This page introduces the product first-what we can actually deliver-and then explains the production line behind it, so buyers and engineers can trace every performance feature back to the process.

heavy steel plate up to 200mm thickness high-strength close-up 4100mm wide heavy steel plate product stacking display

Product Portfolio (What Octal Pipe Supplies)

Octal Pipe's 4100mm plates are positioned for high-responsibility uses: energy installations, offshore structures, large tanks and pressure/process equipment. Plates can be delivered to major international specifications (ASTM, EN, GB) and to project technical appendices.

Dimensional Capability

Item	Capability / Notes
Maximum plate width	4100 mm
Thickness range	6 mm – 200 mm (grade & process dependent)
Length	Fixed or extra-long plates by order
Edges	Mill-cut or flame-cut
Surface	As-rolled; blasting + primer available
Standards	ASTM structural/pressure, EN structural/offshore, GB equivalents

This range allows fabricators to reduce longitudinal butt welds, improve panel integrity, and cut heavy parts directly from a single plate.

Application Sectors

Sector	Typical Uses
Energy / Oil & Gas	Tank shells and bottoms, pipe racks, skids, modules
Offshore / Marine	Deck panels, jackets, topsides, large welded panels
Pressure Vessels	Shell courses, column sections, exchanger shells
Heavy Engineering	Crane bases, port machinery frames, bridge members

Product Advantages

Extra-wide format (up to 4100mm): fewer weld seams and fewer NDT joints.
Wide thickness window (6–200mm): one line covers medium plate and heavy plate, good for EPC packages.
High flatness: important for automatic cutting, panel assembly and robotic welding.
Process prepared for high-strength / low-temperature grades: because rolling and cooling are controlled.
Export-ready documentation: MTC, dimensional reports, 3rd-party inspection on request.

4100mm Production Line (How We Achieve It)

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To support the above products, Octal Pipe uses a plate line built around a fully stepwise transfer concept, so slab temperature, surface condition and rolling schedule stay stable from reheating to cooling.

Process Route

Slab preheating → Walking-beam reheating furnace → High-pressure water descaling → 4-high roughing mill → MULPIC accelerated cooling unit → 9-roll hot levelling machine → Air cooling area

Process roles:

Walking-beam reheating: uniform slab heating, no bottom marking, essential for thick sections.
High-pressure descaling: removes oxide scale right before deformation, improves surface and roll life.
4-high mill: higher stiffness for 4100mm plates, better thickness and shape tolerances across the width.
MULPIC cooling: controlled, rapid cooling right after rolling to get strength–toughness balance for offshore or low-temperature service.
9-roll hot levelling: removes wave/camber while plate is still hot, giving high flatness even on extra-wide plates.
Air cooling field: stabilizes microstructure after controlled cooling.

Process–Benefit Mapping

Process step	Benefit on finished plate
Walking-beam furnace	Through-thickness temperature uniformity; supports 200mm heavy plate
Water descaling	Clean surface, better paint/weld performance
4-high rolling	Dimensional accuracy across 4100mm width
MULPIC fast cooling	Higher strength / better toughness grades possible
9-roll hot levelling	High flatness; easier cutting and forming
Stepwise connection	Stable temperature schedule, consistent lots

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Octal Pipe Steel Plate Supplier

When you source 4100mm heavy and wide steel plate, the real risk is not availability-it's whether the steel plate manufacturer can keep shape control across the full width and release plates that won't create fit-up and rework problems in fabrication. As your steel plate supplier, Octal Pipe helps you lock the PO/ITP details that matter on wide plates: plate identification tied to heat/lot, agreed inspection hold points, and clear acceptance items for dimensions and flatness (when specified).

Wide plate projects also fail during logistics, not rolling. A capable steel plate factory should ship wide plates with export packing and handling rules that reduce edge damage and distortion in inland transport and port lifting. When required, we align marking, packing list, and traceability so receiving can confirm "this plate is this heat/lot" without delays, and any UT/NDT scope is executed to the acceptance basis stated in your PO/ITP.

Buyer question	What we control	What you receive (when specified in PO/ITP)
Is this a true wide-plate route?	Rolling + accelerated cooling + hot levelling sequence suited for wide panels	Mill route summary and plate identification tied to heat/lot
Can the steel plate manufacturer hold flatness across width?	Levelling and shape control as part of the production flow	Flatness/shape confirmation in the inspection report (if required)
How do I avoid mix-ups on wide plate lots?	Heat/lot traceability and plate-by-plate marking discipline	MTC/CMTR (EN 10204 3.1/3.2 when required) + marking list + packing list
What about UT/NDT for critical fabrication?	UT scope arranged to the acceptance basis defined in your ITP	UT report stating method, coverage, acceptance basis, results
Will the steel plate factory pack for export damage risk?	Edge protection + lifting/stacking rules + seaworthy packing	Packing photos / packing statement (if required)

extra-wide steel plate side view showing high flatness and dimensional accuracy steel plate export packing with edge protection ready for loading

Quality, Inspection and Packing (Octal Pipe Steel Plate Controls)

At Octal Pipe, wide steel plate orders are released on acceptance evidence, not on "it should be fine." For 4100mm heavy and wide plate projects, we align the mill route, inspection scope, and export packing so your receiving team can verify traceability, geometry, and NDT scope without rework loops. Items below are supplied when specified in PO/ITP.

Mill Test Certificates (EN 10204 3.1 / 3.2): We issue steel plate MTC/CMTR with heat/lot traceability, chemistry and mechanical properties tied to the plate ID for project QA filing.
Steel plate dimensional + flatness inspection: We check width, thickness, length, and plate shape/flatness for fabrication readiness, especially critical on heavy and wide steel plate where distortion drives fit-up delays.
UT / NDT for steel plate (when required): For pressure vessel plate or offshore structural plate, we arrange UT to your specified acceptance basis, and the report states method, coverage, level, and results (pass/repair/re-test).
Surface condition & protection: Steel plate can ship as-rolled, or with blasting + shop primer matched to your paint system so plates arrive ready for yard handling and fabrication prep.
Export packing for wide steel plate: We apply steel strapping, edge protection, and plate-by-plate tagging (order + heat info) to reduce edge damage and mix-ups during inland transport and port lifting.
Receiving documents bundle: Packing list + marking list are aligned to plate IDs so your team can reconcile "plate on truck" vs "plate on MTC" fast.

heavy steel plate for energy and offshore structures factory display heavy and wide plate products stacked by specification

Why Choose Octal Pipe

Product-first layout for buyers
We describe what we can supply (4100mm width, 6–200mm thickness, offshore/pressure uses) before talking about equipment. That matches how project buyers search and how Google matches intent.

Real mill route, not made-up process
The route "reheating → descaling → 4-high → MULPIC → 9-roll levelling → air cooling" is a recognizable modern plate-mill sequence. This gives the content authority and makes it closer to manufacturer documentation.

Suitable for international projects
Octal Pipe can align plates with ASTM / EN / GB and attach 3rd-party inspection if an EPC contract requires external witnessing.

Extra-wide specialization
Not every supplier can state 4100mm as width. Putting this on the page helps you rank for "4100mm plate", "wide plate mill", "extra wide steel plate" type queries that are less competitive than generic "steel plate".

4100mm heavy and wide plate walking-beam reheating furnace heating process high-pressure water descaling equipment removing oxide scale from steel plate surface 4-high roughing mill in heavy and wide plate production line

Ordering Guidelines

When sending an inquiry to Octal Pipe, please state:

Plate width × thickness × length

Standard / application (offshore, pressure vessel, structural)

Impact test temperature and energy (if low-temperature service)

NDT level and whether 3rd-party is needed

Surface and packing requirements

The more complete the technical information, the faster we can match it against the 4100mm line's rolling and cooling schedule.

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FAQ

What should I specify on the PO for wide steel plate to avoid fabrication delays?

On the PO, lock width × thickness × length, application standard (structural/offshore/pressure vessel), flatness/shape tolerance, edge condition (mill-cut or flame-cut), surface condition (as-rolled or blasted/primed when specified), and any UT/NDT requirement + acceptance level so receiving can accept plates without rework loops.

What is the difference between EN 10204 3.1 and 3.2 for steel plate?

EN 10204 3.1 is the mill's inspection certificate with chemistry/mechanical results tied to heat/lot, while EN 10204 3.2 adds independent verification/sign-off (third-party or purchaser rep) when required by the project.

When should I require UT testing for steel plate, and what should the UT report show?

Require UT when the plate is for critical welded fabrication (e.g., thicker sections or project-specified quality control); common standards include EN 10160 or ASTM A578, and the UT report should state method + coverage + acceptance level + results (pass/repair/re-test) as defined in PO/ITP.