Steel Structure Pipe Rack for Petrochemical and Industrial EPC Projects
Xinguangzheng fabricates prefabricated steel pipe rack structures for refineries, LNG terminals, chemical plants, utility corridors and industrial EPC projects, with structural drawing support, corrosion protection, EN 1090 documentation and project-specific quality records.
- Structural modeling based on project load schedules
- Prefabricated and numbered steel members for site erection
- HDG and coating options for coastal and industrial environments
- Quality documents including mill certificates, weld reports and coating records
Structural Load Requirements That Separate Pipe Rack Design from General Steel Fabrication
Pipe rack structures are not standard building frames. Their design depends on operating load, hydrotest load, thermal anchor forces, wind load, seismic load and cable tray load from the piping discipline. Getting these inputs right before fabrication begins is what separates a successful project from one that stalls at the engineering review stage.
At Xinguangzheng, we work with EPC contractors and owner-operator procurement teams who provide preliminary or completed load schedules before shop drawing issuance. Each structural tier is designed to handle its specific combination of loads simultaneously — and in many multi-tier pipe racks, the hydrotest condition controls member sizing, not the operating condition.
Pipe rack column bases must transfer vertical loads, horizontal thrust and overturning moment through anchor bolt connections to the foundation. A structural model that omits thermal expansion forces will fail the IFA drawing review — we require at minimum operating load, hydrotest load, wind speed, seismic classification and applicable design standard before structural modeling begins.
Pipe Rack Types and Delivery Scope: What Xinguangzheng Fabricates and Supplies
Understanding the exact boundary of supply is critical for EPC procurement and project scheduling. The table below defines what is included in our standard scope and what falls outside it. Scope exclusions are firm unless confirmed in writing during the inquiry stage.
| Scope Item | Included? | Notes |
|---|---|---|
| Multi-tier pipe rack structure | ✓ Yes | For refinery, LNG, chemical plant and utility corridor projects |
| Single / double-tier pipe racks | ✓ Yes | For lower load process and utility corridors |
| Equipment support structures | ~ Project-specific | Heat exchanger frames, vessel supports, pump and compressor base frames |
| Individual pipe supports | ✓ Yes | Guide, anchor and sliding support components |
| Structural drawings and 3D model files | ✓ Yes | Based on supplied load parameters from buyer or piping discipline |
| Corrosion protection | ✓ Yes | HDG or multi-coat coating system based on site corrosion class |
| Mill certificates and weld inspection records | ✓ Yes | Included in standard quality documentation package |
| Numbered packing lists and coating thickness logs | ✓ Yes | Component-level records for EPC and owner-operator review |
| Foundation design and concrete works | ✕ Excluded | Buyer or civil contractor scope; anchor bolt design available on request |
| On-site installation labor | ✕ Excluded | Erection guidance documentation provided; site supervision on request |
| Pipe spools, cable trays, spring hangers | ✕ Excluded | Excluded unless coordinated supply is confirmed during inquiry |
| Baseplate grouting | ✕ Excluded | Civil contractor scope |
When This Pipe Rack Fabrication Service Is Not Suitable
This service is not suitable for all pipe rack enquiries. Because structural design and member sizing depend on confirmed load data, we cannot begin fabrication on undefined or speculative project requirements.
- No process load data available: Pipe rack fabrication for petrochemical service requires at minimum a preliminary load schedule before shop drawings can be issued.
- Design standard not yet determined: Projects without a confirmed design code (AISC, EN 1993 or GB 50017) cannot be priced or engineered accurately.
- Corrosion environment undefined: Coastal, marine-adjacent and heavy industrial sites require specific protection systems that cannot be finalized without a site classification.
- EPC approval process requires local fabrication: Some projects specify in-country fabrication or an existing approved vendor list that our documentation package alone may not satisfy.
If your project is at an early feasibility stage, use our Technical Review Request to share available load data.
This Service Is Well-Suited For:
Design Standards, Load Input Parameters and Supplier Pre-Qualification Requirements
EPC and owner-operator procurement processes for pipe rack steel structures typically require a confirmed design standard and a minimum set of load inputs before fabrication scope and pricing can be finalized. At Xinguangzheng, structural modeling follows AISC, EN 1993 or GB 50017 depending on the project specification.
American Standard
Applicable to projects specifying North American design practice, including US, Canada and many projects in Latin America and the Middle East under US-based EPC contractors. Member sizing, connection design and load combinations follow AISC 360, with lateral and gravity loads per ASCE 7.
European Standard
Required for projects within the EU, and commonly specified by European EPC contractors working in Africa, Southeast Asia and the Middle East. EN 1090 CE marking requirements may apply to fabricated structural components when specified in the purchase order or project quality plan.
Chinese National Standard
Applicable to projects in China and infrastructure projects developed under Chinese EPC frameworks in Africa, Southeast Asia and Central Asia. Material designation Q345B (equivalent to S355JR / A572 Gr.50) is standard for primary structural members in industrial pipe rack applications.
| Required Load Input | Why It Matters for Fabrication |
|---|---|
| Operating load per tier (kN/m or kN) | Defines pipe weight in service; primary input for beam sizing |
| Hydrotest load per tier | Often controls beam and column sizing; cannot be assumed from operating load |
| Thermal anchor and friction loads | Required to design support connections and column base reactions |
| Design wind speed (m/s or mph) | Determines lateral load on the exposed face of the pipe rack |
| Seismic zone / site classification | Required for earthquake-prone sites; affects horizontal force and connection design |
| Cable tray load per tier | Must be separated from pipe load; affects beam size where trays are integrated |
| Applicable design standard | Determines calculation methodology, drawing format and CE/EN 1090 requirements |
| Corrosion environment classification | Required to specify coating system or hot-dip galvanizing; affects lead time |
Corrosion Protection Selection for Coastal and Industrial Environments
Corrosion protection for petrochemical pipe racks is not a budget decision — it is an engineering decision driven by ISO 12944 corrosion category assessment. Specifying a C3 coating system for a C5-M marine environment will result in early coating breakdown and unplanned maintenance within the first decade of service.
At Xinguangzheng, from our experience delivering industrial steel structures to 130+ countries, we have seen projects in coastal refineries and LNG terminals where the corrosion specification was downgraded during procurement. The cost of field recoating at an operating facility significantly exceeds the difference in initial supply cost. Our recommendation is to confirm the ISO 12944 corrosion category at the inquiry stage and select the appropriate protection system before the purchase order is issued.
| Site Environment | ISO Class | Recommended Protection | Notes |
|---|---|---|---|
| Inland industrial, low humidity | C2–C3 | Three-coat system: zinc-rich primer + epoxy intermediate + polyurethane topcoat | Standard for inland process and utility corridors |
| Coastal / heavy industrial | C4 | Hot-dip galvanizing for bents and cross-frames; suitable for most pipe rack members | HDG adds 3–4 weeks to lead time; confirm member dimensions at inquiry |
| Marine-adjacent, offshore-influenced | C5-I / C5-M | HDG plus sealing topcoat, or thermal spray zinc for primary structural members | Confirm during scoping; oversized members may require alternative coating |
| Oversized or complex geometry members | Any | Coating system review based on member length, weight and dipping tank limitations | Very long columns may exceed standard HDG tank capacity |
Hot-dip galvanizing adds typically 3–4 weeks to the fabrication schedule and has geometry constraints: members must fit within the dipping tank dimensions. For projects with short delivery windows or oversized structural bents, confirm the corrosion specification early so we can propose the appropriate protection system without affecting the delivery date. Technical parameters are approximate ranges based on project data.
Engineering Assumptions That Delay Pipe Rack Projects
From our experience working with EPC contractors and industrial project teams across 130+ countries, three recurring assumptions consistently stall projects at the engineering review or site erection stage. Understanding these early is more valuable than discovering them during the IFA drawing review.
Treating Pipe Rack Design Like a Standard Steel Frame
Applying general steel fabricator experience to pipe rack structural design without accounting for process load schedules — particularly hydrotest loads and thermal anchor forces — produces an under-designed structure. The issue does not become apparent until the piping discipline reviews the IFA drawings and requests additional capacity.
Defaulting to Standard Coating for Coastal Projects
Coastal petrochemical and LNG terminal projects in C4 and C5-M environments cannot use a standard inland coating specification. Applying a C3 system to a marine-adjacent site results in measurable coating degradation within the first 3–5 years of service, depending on site access, maintenance policy and exposure conditions.
Anchor Bolt Load Transfer Without Foundation Coordination
Pipe rack column bases must simultaneously transfer vertical load, horizontal thrust from thermal expansion and overturning moment through anchor bolt connections to the foundation. When the civil contractor designs the foundation without access to the structural engineer's base reaction summary, the connection design is mismatched and requires field modification at erection.
Quality Documentation for Pipe Rack Steel Structure Delivery
For EPC and owner-operator procurement review, Xinguangzheng provides project-specific quality records covering the full fabrication and delivery process. The documentation package is assembled according to the inspection and test plan (ITP) defined in the purchase order, and can include Manufacturer's Record Book (MRB) compilation when specified.
Mill Certificates (MTC)
Material test certificates for all primary structural steel, traceable to heat number and batch. Confirms material grade, mechanical properties and chemical composition in accordance with Q345B / S355JR / A572 Gr.50 or project-specified grade.
Weld Inspection Records
Documentation of weld procedures (WPS/PQR), welder qualification records and non-destructive examination results. Visual inspection, dimensional check and NDT reports issued per the approved ITP and applicable welding standard.
Dimensional Check Sheets
Component-level dimensional verification records confirming fabricated member lengths, hole patterns, flange flatness and connection geometry against approved shop drawings. Issued before packing and shipped with the consignment.
Coating Thickness Logs
Dry film thickness (DFT) records for each coat applied, measured per batch and recorded against the approved coating specification. HDG inspection records include batch number, zinc bath temperature and coating thickness measurement per ISO 1461.
Numbered Packing Lists
Component-numbered packing lists correlating each fabricated member to a unique mark number, drawing reference, bundle number and shipping weight. Enables efficient site unloading, inventory check and erection sequencing without requiring specialist interpretation on site.
ITP Records & MRB Compilation
Inspection and test plan records documenting hold points, witness points and review stages per the purchase order. Manufacturer's Record Book compilation available when specified, consolidating all quality documentation into a single traceable delivery record.
Industrial Steel Structure Fabrication Since 1997
Xinguangzheng Steel Structure Group has been fabricating industrial and petrochemical steel structures since 1997. Our 4 manufacturing bases across 150,000 m² of production area are equipped with 3 H-beam production lines producing 50,000 tonnes per year, giving EPC procurement teams the capacity and throughput needed for large project schedules.
Our 40+ design engineers work to AISC 360, EN 1993 and GB 50017, and our 21-member quality control team — with up to 30 years of fabrication experience — oversees material verification, weld inspection and coating records for every project. As a New OTC-listed manufacturer (stock code 834422), our project documentation and financial traceability meet the requirements of international EPC pre-qualification processes.
Submit Your Pipe Rack Project Requirements
Share your load schedule, site conditions, design standard and delivery requirements. Our engineering team will review your project parameters and respond with a fabrication scope and preliminary lead time — typically within 2 business days.
Request a Technical Review