FFH75×500Z Diverter Pipeline & Structural

1

CH970301-100100

Shell

-

Carbon steel Q355B + epoxy coating

1. Corrosion from fluid medium; 2. Impact damage during installation

1. Inspect coating integrity monthly; 2. Use anti-corrosion primer for touch-ups, comply with GB/T 18593

2

CH970301-1002

Connecting plate

-

Alloy steel 35CrMo

1. Fatigue cracking from pressure fluctuations; 2. Thread wear

1. Test pressure resistance per ASME B16.5; 2. Torque fasteners to 80±5 N·m

3

CH970301-1003

Flow line

-

Stainless steel 304

1. Abrasive wear from fluid impurities; 2. Pitting corrosion

1. Install inline filters to reduce impurities; 2. Clean with passivating agent quarterly

4

CH970301-1004

Reserve line

-

Stainless steel 304

1. Oxidation from long-term inactivity; 2. Moisture-induced rust

1. Flush with dry air monthly; 2. Keep valves closed when idle to prevent moisture entry

5

CH970301-1005

Flow line flange

13 5/8

Carbon steel Q235 + galvanizing

1. Gasket degradation; 2. Bolt loosening from vibration

1. Replace gaskets every 6 months; 2. Use lock washers and retorque monthly

6

CH970301-1006

Testing line

-

Stainless steel 316

1. High-pressure fatigue; 2. Chemical corrosion from test media

1. Do not exceed rated pressure (10MPa); 2. Flush with neutral detergent after testing

7

CH970301-1007

Reserve flange

4 1/16

Carbon steel Q235 + galvanizing

1. Zinc coating peeling; 2. Warping from improper storage

1. Store in dry, flat area; 2. Re-galvanize if coating peels more than 10%

8

CH970301-1008

Washing line

-

Stainless steel 304

1. Clogging from cleaning agent residues; 2. Erosion from high-velocity flow

1. Flush with clean water after use; 2. Control flow velocity ≤5m/s

9

CH970301-1009

Testing flange

3 1/8

Carbon steel Q235 + galvanizing

1. Seal failure from repeated disassembly; 2. Corrosion at bolt holes

1. Apply thread sealant to bolt holes; 2. Replace seals after 3 disassembly cycles

1

CH970301-2101

Y-junction

-

Stainless steel 316

1. Flow-induced erosion at branching; 2. Stress corrosion cracking

1. Smooth internal surface to reduce flow resistance; 2. Avoid chloride exposure >20ppm

2

CH970301-2102

Tube holder

-

Carbon steel Q235 + anti-rust paint

1. Wear from pipeline vibration; 2. Paint peeling

1. Install vibration dampers; 2. Re-paint every 12 months, comply with GB/T 1720

3

CH970301-2103

Join

M20×14

Alloy steel 42CrMo

1. Thread galling; 2. Fatigue from pressure cycles

1. Apply anti-galling paste before assembly; 2. Inspect thread integrity quarterly

4

520901035800300000

Stainless steel

14 (GB/T3764)

Stainless steel 304

1. Oxidation; 2. Corrosion from chemical media

1. Store in sealed container when unused; 2. Avoid contact with strong acids/bases

5

520901035300300000

Nut

G14 (M20×14, GB/T3759)

Stainless steel 304

1. Thread stripping; 2. Loosening from vibration

1. Do not over-torque (max 90 N·m); 2. Use nylon insert lock nuts for reinforcement

6

030903012310014000

Stainless steel pipe

φ14, L=5m

Stainless steel 304

1. Bending deformation during installation; 2. Pitting corrosion

1. Use pipe benders for shaping; 2. Clean with nitric acid passivator annually

1

CH970301-260101

Male sub joint

Stainless steel 316

1. Seal wear from repeated connection; 2. Thread damage

1. Replace seals after 5 connections; 2. Use thread protectors when disconnected

2

CH970301-260102

Rib plate

Carbon steel Q355B

1. Fatigue cracking from load; 2. Corrosion

1. Weld per AWS D1.1 standard; 2. Apply anti-corrosion paint after welding

3

CH970301-260103

Turn plate

Alloy steel 35CrMo

1. Wear at rotational contact; 2. Deformation from overload

1. Lubricate contact surfaces monthly with lithium grease; 2. Do not exceed load limit (20kN)

4

CH970301-2601040

Turn block

Alloy steel 35CrMo

1. Abrasive wear; 2. Galling between metal surfaces

1. Apply anti-seize compound; 2. Inspect for wear every 3 months (limit ≤0.2mm)

5

CH970301-260105

Connecting pipe

Stainless steel 304

1. Erosion from fluid flow; 2. Weld joint corrosion

1. Polish weld joints to smooth finish; 2. Flush pipeline regularly

6

CH970301-260106

Female sub joint

Stainless steel 316

1. Internal seal degradation; 2. Corrosion from fluid

1. Test seal integrity monthly with pressure test; 2. Use compatible fluids per material guidelines

7

CH970301-260201

Bracket

Carbon steel Q235B + galvanizing

1. Loosening from vibration; 2. Zinc coating wear

1. Anchor to stable structure; 2. Touch up galvanizing if damaged

8

CH970301-26020200

Turn plate

Alloy steel 35CrMo

1. Thermal stress cracking; 2. Wear at pivot points

1. Operate within -20℃ to 120℃; 2. Replace pivot pins after 12 months

9

CH970301-26020300

Turn block

Alloy steel 35CrMo

1. Fatigue from repeated rotation; 2. Corrosion

1. Limit rotation cycles to 1000/month; 2. Apply anti-corrosion grease

1

420201011112065000

Bolt

M12×65

GB/T5782

Carbon steel 45#

1. Fatigue fracture; 2. Rust from moisture

1. Torque to 45±3 N·m; 2. Apply anti-rust oil in humid environments

2

420503015121600000

Spring washer 12

Size 12

GB/T93

Spring steel 65Mn

1. Loss of elasticity; 2. Cracking from over-compression

1. Replace after 2 disassembly cycles; 2. Avoid over-torque

3

420201011112040000

Hexagon-headed Bolt

M12×40

GB/T5782

Carbon steel 45#

1. Cross-threading; 2. Vibration-induced loosening

1. Use matching hex key; 2. Pair with spring washers and lock nuts

How often should stainless steel pipelines be passivated?

Passivate stainless steel pipelines (e.g., CH970301-1003) every 3-6 months, or more frequently in corrosive environments. Follow GB/T 15519 standard for passivation process to enhance corrosion resistance.

What lubricant is suitable for rotational components like turn blocks?

Use lithium-based grease (NLGI 2) for general conditions. For high-temperature (>100℃) environments, switch to high-temperature synthetic grease (operating range -40℃ to 180℃) to avoid grease degradation.

How to prevent thread galling on sub joints?

Apply molybdenum disulfide-based anti-galling paste before assembling male/female sub joints. Avoid over-torque, and use thread protectors when joints are disconnected to prevent damage.