Bill listing and quota application for installing water-treatment plant (plate-and-frame sludge dewatering machines / filter presses): the dividing line between general building services GB/T 50856 and municipal GB/T 50857, and the corresponding items of local municipal consumption standards

Topic Positioning

This card settles the bill listing and quota application for installing water-treatment plant (plate-and-frame sludge dewatering machines / filter presses as the type example): which standard lists such plant between GB/T 50856 (general building services) and GB/T 50857 (municipal works), and the corresponding items of the local municipal consumption standards.

Core Conclusions

1. Bill listing (specialist water-treatment plant goes municipal, not general installation)

1. GB/T 50856-2024 Annex C (fabrication and installation of static equipment and process metal structures), C.9.7, original: "the installation of sewage treatment equipment and other water-treatment equipment shall be coded per the corresponding items of the current national standard GB/T 50857, Quantity Take-Off Standard for Municipal Works." -> the general-services bill sets no water-treatment equipment items (filter presses / dewatering machines included) - they must go municipal.
2. GB/T 50857-2024 Annex F water treatment works, F.2.1, original: "the item setting, item descriptions, units and measurement rules of water-treatment equipment follow table F.2.1. Table F.2.1 water-treatment equipment (code 040602)." Items list in the 040602 series, unit "unit", by design-shown count, work content installation plus no-load trial run.
3. GB/T 50857-2024 Annex F F.3.2, original: "this chapter lists only the specialist items of water-treatment works; instruments, pumps, valves and other standard, catalogue plant shall be coded per GB/T 50856." -> the press / dewatering machine proper is "water-treatment plant" under municipal Annex F; its companion pumps, valves and instruments list under GB/T 50856.

2. The line between the two standards (GB/T 50856-2024 clause 3.0.6, key points) 1 Electrical versus municipal street lighting: road and landscape lighting, parks, squares and public courts inside plants and estates lists under 50856; city road lighting systems under 50857. 2 Industrial piping versus municipal networks: water pipes end at the meter chamber at the plant entrance; drainage at the first manhole outside the plant wall; heat and gas at the first meter (valve) at the plant entrance. 3 Water supply, drainage, heating and gas works (fire piping included) versus municipal networks: outdoor pipes end at the junction chamber with the municipal main.

3. Quota direction (specialist water-treatment installation items sit in the municipal water volume)

• Beijing DB11/T 2382-2024 Annex D municipal works: table D.5.29-4 "plate-and-frame sludge dewatering machine" sets D5-2-228 (plates 810 x 810) and D5-2-229 (870 x 870), unit "unit", work content: unpacking and checking, setting out on the foundation, on-site haulage, hoisting, setting and levelling, first grouting, oiling, no-load trial run; the same table group holds screw-press, centrifugal and box-type dewatering machines, thickeners and combined thickening-dewatering units.
• Shenzhen SJG 181.5-2024 Municipal Consumption Quota Standard, Volume 5 water treatment: 2.3.24 "sludge dewatering machine" lists screw, screw-press, centrifugal, plate-and-frame and box types, unit "unit", work content: unpacking and checking, setting out, hoisting, first grouting, levelling, setting, oiling, trial run. 2.2.1: dewatering machines, filter presses, thickeners and combined units are distinguished by type, material, specification, model and parameters and counted per "unit". 2.1.3: borrowing into the installation volumes - instruments / pumps / valves and other catalogue plant, set and sub-system commissioning, rail installation, washdown devices, aeration and the companion water, air and electrical control systems execute the corresponding items of the Installation Consumption Quota Standard.
• Hunan 2024 municipal consumption standard (2025 edition in the source data): the water-treatment equipment chapter sets item 24 "filter press installation", 25 "sludge dewatering machine installation" (plate-and-frame, roller-drum, screw, screw-press, centrifugal, box, granulating), 26 thickener installation, 27 combined unit installation, unit "unit", work content: unpacking and checking, setting out, on-site haulage, setting, levelling, oiling, trial run.
• Railway quota (National Railway Administration document [2017] No. 33), chapter 6 mechanical equipment installation: chapter notes include "water-treatment equipment installation" (alongside pump installation and dismantling checks, automation instruments etc.), with its own measurement rules.
• Electronic-industry wastewater has its own code: GB 51137-2015 clause 4.5.1 - "this section applies to the installation and acceptance of press equipment and centrifugal dewatering equipment in sludge treatment systems" (press equipment covering recessed-chamber, plate-and-frame and belt presses).

4. Application points Match items on "item description (type / material / specification / parameters) plus work content": plate-and-frame machines band by plate size (810 x 810, 870 x 870 etc.); the work content already includes first grouting and the no-load trial run - neither may be listed again; local item codes serve their regions only.

Applicability Boundaries

• Attribution follows the current GB/T 50856-2024 and GB/T 50857-2024; local item codes and work contents serve their regions - no cross-region mixing.
• The general-services bill truly sets no water-treatment items - do not hunt for filter press / dewatering items in GB/T 50856.
• The concrete 040602 codes of "sludge dewatering equipment" in Annex F table F.2.1 must be read from the standard's continuation pages (codes after the aerators lie outside this card's evidence; none is invented here).
• Railway, electronics and other sector works follow their sector volumes / codes (railway per document [2017] No. 33; electronics wastewater per GB 51137-2015) - the municipal volume must not be applied directly.
• Local labour / material / plant consumption values follow the current local standard; this card lists none.

Further Reading

• GB/T 50856-2024 quantity take-off standard for general building services, Annex C C.9.7; clause 3.0.6 (the line against the municipal standard)
• GB/T 50857-2024 quantity take-off standard for municipal works, Annex F water treatment, F.2.1 and F.3.2 (table F.2.1, code 040602)
• Beijing DB11/T 2382-2024 Construction Works Consumption Quota Standard, Annex D municipal works, table D.5.29-4, items D5-2-228 and D5-2-229
• Shenzhen SJG 181.5-2024 Municipal Consumption Quota Standard, Volume 5 water treatment, 2.1.3 (borrowing), 2.2.1 (measurement), 2.3.24 (dewatering machines)
• Hunan 2024 municipal consumption standard (2025 edition in the source data), water-treatment equipment chapter (presses, dewatering machines, thickeners)
• National Railway Administration document [2017] No. 33, Railway Works Budget Quota, chapter 6, chapter notes
• GB 51137-2015 Code for Construction and Acceptance of Wastewater and Waste Gas Treatment in the Electronics Industry, clause 4.5.1