【Haichuan EPC】Petrochemical installation quota – Pricing regulations for anti-corrosion steel structures and pipeline repairs

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Provisions for the Pricing of Anti-corrosion Patching Work in Petrochemical Installation Quotas, October 14, 2025. The issue of how to price the patching work carried out during the anti-corrosion treatment of pipelines and steel structures is a common one. Below, we will discuss this matter in brief, drawing on the \"Budget Quotas for Petrochemical Installation Projects\" (2019 edition) as well as relevant materials from petrochemical quota standards. I. Secondary rust removal at the pipe welding areas: In the actual construction process, shot blasting is used for rust removal on the pipes. The areas around the welds at both ends of the pipes are also cleaned of rust. Due to the requirements of pipe welding, no coating is applied to those welding areas; anti-corrosion treatment is carried out only after installation, inspection, and pressure testing are completed. However, the areas on either side of the welds need to be rust removed again using power tools. The secondary rust removal in this section is part of the normal construction process and involves secondary rust removal; the volume of work for this is calculated separately. The relevant items for rust removal using powered tools are applied according to the rust severity level indicated on the confirmation forms provided by the project owner and supervisor on site. II. Anti-corrosion repair of steel structures 1. All anti-corrosion work on steel structures is carried out by one and the same anti-corrosion contractor; that is, both the anti-corrosion treatment and the repair work on steel structures are done by the same contractor, and no fee is charged for the repair work. The work content of the quota item for anti-corrosion treatment of steel structures already includes patching work. 2. The anti-corrosion work for steel structures is carried out by two separate contractors: one contractor is responsible for the anti-corrosion treatment of the steel structures (usually the manufacturer of the steel structures), while another contractor handles the patching work (usually the installation unit of the steel structures); the installation unit incurs additional costs for the patching work. When the construction party only carries out anti-corrosion patching of the steel structures on site, rust removal of the welds is carried out in accordance with the rust removal procedures specified in Section 1; the primer, intermediate coat, and topcoat are applied according to the number of application rounds agreed upon by both parties, and the volume of work is calculated based on the weight of the areas that require patching. The quota item for on-site primer anti-corrosion patching is applicable to projects that involve only patching work. According to the explanations provided by the Petrochemical Quota Station: \"The quantity of work can be calculated by referring to the proportion of the steel structure in question to the total weight of the entire steel structure.\" ”This assumption is based on the fact that both parties have specified in the construction contract the proportion of the repaired area to the total weight of the steel structure, or that they have reached an agreement regarding this proportion. III. Repair of pipe welds and anti-corrosion treatment of pipe fittings 1. All anti-corrosion work on the pipes is carried out by one and the same anti-corrosion contractor; that is, both the anti-corrosion treatment and the repair of the pipes are done by this same contractor, and no fee is charged for the repair work. The work content of the sub-item for pipeline anti-corrosion work already includes patching work. See the screenshot below: 2. The pipeline anti-corrosion work is carried out by two separate anti-corrosion contractors; that is, one contractor is responsible for the anti-corrosion treatment of the pipelines (usually the contractor specialized in pipeline anti-corrosion), while another contractor handles the patching work (usually the pipeline installation contractor), with the latter charging an additional fee for the patching work. 3. The calculation rule for the fixed-amount anti-corrosion workload is based on the length of the pipes in meters; this includes the fittings as well, with no separate calculation for the anti-corrosion treatment of the fittings. However, the construction contractor only carries out anti-corrosion treatment on the fittings, not on the straight pipes; the corresponding quota items for pipeline anti-corrosion are applied, with the labor cost multiplied by a 1.2 factor to account for minor inefficiencies. 4. The pipes arrive at the site with 3PE anti-corrosion coating; after installation by the construction unit, polyolefin tape is used for anti-corrosion sealing of the welds, and polyolefin tape is also used for anti-corrosion sealing of the fittings. The sealing of welds is carried out in accordance with the quota items related to polyethylene shrinkage tape sealing for pipes, while the sealing of fittings is done using the same quota items; the labor cost is multiplied by a factor of 1.2 to account for minor inefficiencies.