Guidelines for On-Site Storage & Protection Management of Buried Scraper Conveyors

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This document outlines procedures for the storage, protection, and requisition of buried scraper conveyor components (including casings, chains, drives, and spares) at construction sites. It aims to prevent damage, corrosion, or loss, ensuring equipment integrity and installation quality for all project-related parts.

1 Purpose

To standardize the storage, stacking, protection, identification and requisition of components and complete sets of buried scraper conveyors at the construction site, prevent deformation, corrosion, damage and loss, and ensure installation quality and equipment integrity.

2 Scope of Application

Applicable to all components of buried scraper conveyors on the project site, including: head assembly, tail assembly, intermediate casing, scraper chain, drive device, motor, reducer, chain cover, connecting chute, bearing housing, chain wheel, standard parts, bolts, seals, spare parts, equipment legs and brackets.

3 Requirements for Storage Area

Site conditions: The site shall be flat, solid, dry and well-ventilated, away from foundation pits, water accumulation areas, corrosive substances, open flames and welding work zones, and equipped with rainproof, sun-proof and dust-proof measures.

Zone division: Inspection Area → Qualified Area → Unqualified/Pending Disposal Area

Equipment shall be placed according to its application scope and complete sets for installation, and shall not be mixed with other equipment to avoid confusion of installation components.

Safety requirements: Passages for equipment placement must be unobstructed to facilitate forklift/hoisting operations, so as to prevent collision and unnecessary damage during equipment hoisting.

4 Arrival and Warehousing

4.1 Count the quantity promptly after arrival, inspect the integrity of packaging cases, and check components for deformation, collision damage, rain exposure and corrosion. Verify that the nameplates, markings and quantities are consistent with the delivery note.

4.2 Store qualified equipment in the warehouse after acceptance, and establish an on-site equipment ledger, including: name, model, drawing number, quantity, arrival date, storage location, and whether the equipment appearance and condition are intact.

4.3 Isolate and mark unqualified or damaged parts separately, and report them in a timely manner.

5 Requirements for Stacking and Arrangement

5.1 The casing, head assembly and tail assembly shall be placed horizontally. They may be supported by EPE foam, square timber or brackets at the bottom with uniform height. Direct placement on the ground, direct contact with soil, and placement near water sources are strictly prohibited.

5.2 When stacking in multiple layers, wooden battens shall be placed between layers with vertical alignment. The stacking height shall not exceed 3m. Flange surfaces and machined surfaces shall be strictly protected from compression and collision.

5.3 Scraper Chains

Chains shall be stored in complete sets or segments, or placed horizontally on pallets. Dragging, heavy pressure and twisting are strictly prohibited to prevent deformation and collision damage. Adequate protection shall be provided.

5.4 Motor, Reducer, Bearing Housing and Chain wheel

Store on shelves or elevated pallets and keep original packaging. Keep away from rainwater and damp areas. Oil seals and protective covers shall not be removed. Precision components shall be protected against moisture, dust and collision.

5.5 Standard Parts and Small Components

If installation is not carried out immediately after arrival on site, original manufacturer packaging is recommended to remain intact.

When unpacked for installation, bolts, nuts and gaskets shall be sorted by specification; seals and rubber parts shall be collected by quantity.

Unused standard parts after installation shall be classified by model into storage boxes with clear identification for later replacement. Standard parts shall be stored away from direct sunlight, oil and high temperature.

6 Protection Requirements

6.1 All equipment and items shall be protected against rain and moisture. If equipment cannot be installed in a timely manner, it shall be fully covered with waterproof tarpaulin or striped cloth and firmly fastened. Inspections shall be strengthened during the rainy season, with timely drainage, airing and rust prevention measures implemented.

6.2 Machined surfaces, bearings and sprockets shall retain the original factory anti-rust oil. Opened components shall be inspected regularly and re-coated with anti-rust oil if necessary. Long-term accumulation of water and dust is strictly prohibited.

6.3 The casing of buried scraper conveyors is standardized at 3m per section. Treading on the cover plates and stacking other large equipment or tools on the casing is strictly prohibited. Maintain proper spacing during hoisting to avoid collision and deformation. Equipment shall be protected against contamination and kept away from paint, thinners, acidic and alkaline substances to prevent surface damage.

6.4 No debris, garbage, electrode stubs or other large iron scraps shall be stored inside the buried scraper conveyor, so as to prevent the scraper chain from jamming or breaking during operation.

7 Requisition and Issue

7.1 A signature-based requisition system shall be implemented. Equipment and parts shall only be issued against a material requisition form.

7.2 Inspection prior to requisition: Check for deformation, corrosion and damage; ensure clear identification and correct quantity. Valuable and key components (chains, chain wheels, bearings) shall be requisitioned on demand, taking only the required amount. Surplus parts shall be returned to the warehouse promptly and shall not be discarded or placed randomly.

8 Daily Management

If the equipment is not to be installed immediately after arrival at the site, managers shall conduct regular inspections daily or weekly. Check that equipment coverings are intact, and inspect for water accumulation, rust, deformation, clear identification and safe stacking. Complete warehouse inspection records accordingly. In case of component relocation or transfer, the parts shall be re-leveled with supports, properly protected and clearly marked.

9 Re-inspection Before Installation

VT visual inspection must be performed on all components prior to installation. Components shall be free from deformation, corrosion and damage, with no foreign matter inside the casing and intact machined surfaces. Installation shall only proceed upon qualification.

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