NB800M.24.00A Discharge Five-Way Pipe Assembly

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NB800M.24.01.00A

316L stainless steel, precision-ground sealing surface, excellent corrosion resistance and high-pressure bearing capacity (up to 2.5MPa), suitable for harsh industrial media and overpressure protection (-20℃~150℃).

1. Sealing surface wear from frequent overpressure triggering of the safety valve; 2. Impurity accumulation leading to leakage; 3. Material fatigue from long-term alternating pressure.

1. Regularly calibrate the safety valve and clean the sealing surface; 2. Avoid frequent overpressure operation; 3. Inspect for fatigue annually and replace if necessary.

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NB800M.24.02A

Q355B carbon steel, integral forging forming, surface epoxy anti-corrosion coating, high impact resistance and structural stability, compatible with NB800M series fluid discharge systems.

1. Inner wall corrosion from high-sulfur/high-water-content fluid; 2. Structural deformation from excessive fluid pressure; 3. External impact causing pipe wall cracking.

1. Regularly clean the inner cavity and touch up anti-corrosion coating; 2. Monitor fluid pressure to stay within rated limits; 3. Install protective sleeves to avoid impact.

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NB800M.24.03.00A

304 stainless steel, precision machining, surface polishing, good corrosion resistance, suitable for medium-low pressure (0-1.6MPa) working environments and compatible with standard pressure gauges.

1. Sealing surface wear from frequent pressure gauge disassembly; 2. Corrosion from harsh media; 3. Deformation from improper installation torque.

1. Minimize unnecessary disassembly; 2. Inspect for scratches/corrosion regularly; 3. Use a torque wrench (25-35N·m) for installation.

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NB800M.24.04A, R35

Flexible graphite composite, high temperature resistance (-200℃~450℃), excellent compression resilience and sealing performance, suitable for high-pressure fluid pipeline sealing.

1. Aging/brittleness from long-term high-temperature operation; 2. Damage from joint surface burrs; 3. Loss of resilience from over-compression.

1. Replace every 6-12 months or if aging is found; 2. Remove burrs before installation; 3. Control compression ratio (20%-30%).

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NB800M.24.05A, 1 1/8-8UN（12UNF）-2A×90

40CrNiMoA alloy steel, quenched and tempered, tensile strength ≥900MPa, thread precision 2A, excellent fatigue resistance for high-vibration environments.

1. Breakage from uneven installation torque; 2. Thread seizure from rust; 3. Fatigue damage from alternating vibration loads.

1. Apply uniform torque (55-65N·m) with a torque wrench; 2. Use anti-rust/anti-seize agent on threads; 3. Re-tighten periodically if vibration is present.

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NB800M.24.06A, 1 1/8-8UN-2B（SPL）

35CrMo alloy steel, heat-treated (HRC 28-32), thread precision 2B, perfect matching with the corresponding double ends bolt for strong load-bearing.

1. Thread sliding from over-tightening; 2. Hexagon deformation from mismatched wrenches; 3. Rust from harsh environments.

1. Match torque with the bolt; 2. Use the correct size wrench; 3. Clean and apply anti-rust agent regularly.

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NB800M.24.07A, 1 1/2-8UN（12UNF）-2A×130

40Cr alloy steel, quenched and tempered, tensile strength ≥800MPa, thread precision 2A, good fatigue resistance for high-pressure working conditions.

1. Breakage from over-tightening; 2. Thread wear from repeated disassembly; 3. Corrosion from humid environments.

1. Control torque (65-75N·m); 2. Minimize unnecessary disassembly; 3. Apply anti-corrosion agent to threads.

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NB800M.24.08A, 1 1/2-8UN-2B（SPL）

35CrMo alloy steel, heat-treated for enhanced hardness, thickened design for increased load-bearing capacity, thread precision 2B to match the bolt.

1. Thread damage from forced disassembly; 2. Hexagon wear from improper wrench use; 3. Rust leading to seizure.

1. Avoid forced operation during disassembly; 2. Use a matching wrench; 3. Regularly inspect and clean threads.

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NB800M.24.09A, R44

Flexible graphite composite with metal reinforcement, high pressure resistance (up to 3.0MPa), temperature resistance (-200℃~450℃), suitable for large-diameter pipeline sealing.

1. Deformation from uneven compression; 2. Aging from long-term use; 3. Damage from foreign objects between joint surfaces.

1. Ensure uniform compression during installation; 2. Replace every 6 months in high-pressure environments; 3. Clean joint surfaces before installation.

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NB800M.24.10.00A

Q235B carbon steel, welded and reinforced structure, surface anti-rust treatment, strong load-bearing capacity to support the five-way pipe assembly.

1. Weld cracking from excessive load; 2. Rust from environmental exposure; 3. Deformation from improper installation alignment.

1. Ensure load is within rated limits; 2. Touch up anti-rust coating regularly; 3. Align correctly during installation to avoid uneven stress.

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ANSI/ASME B18.2.1-1996, 7/8-9×2 3/8

A325 high-strength carbon steel, heat-treated, tensile strength ≥830MPa, compliant with ANSI/ASME standards, suitable for medium-load fastening.

1. Breakage from over-tightening; 2. Thread wear from repeated use; 3. Corrosion from humid environments.

1. Follow standard torque guidelines (45-55N·m); 2. Replace after multiple disassembly cycles; 3. Apply anti-rust agent in harsh conditions.

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GB/T93-1987, 22

65Mn spring steel, heat-treated for elasticity, surface galvanized for anti-rust, compliant with GB/T93-1987, suitable for matching bolts of corresponding specifications.

1. Deformation from excessive pressure; 2. Rust leading to loss of elasticity; 3. Wear from friction during bolt tightening.

1. Do not reuse deformed washers; 2. Replace if rust is found; 3. Ensure correct alignment with bolts.

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NB800M.24.11A

Nitrile rubber (NBR 70), good oil resistance and elasticity, temperature resistance (-30℃~100℃), tailored for the assembly’s specific joint size and sealing requirements.

1. Aging from long-term use or high temperature; 2. Damage from sharp joint edges; 3. Leakage from improper installation alignment.

1. Replace every 8-12 months; 2. Smooth joint edges before installation; 3. Ensure correct alignment to avoid misalignment.

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ANSI/ASME B18.2.1-1996, 7/8-9×3 1/8

A325 high-strength carbon steel, quenched and tempered, thread precision compliant with ANSI standards, suitable for deep or thick-component fastening.

1. Bending from uneven torque; 2. Thread seizure from rust; 3. Fatigue damage from long-term load-bearing.

1. Apply torque evenly with a torque wrench; 2. Coat threads with anti-rust/anti-seize agent; 3. Inspect for bending regularly.

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ANSI/ASME B18.2.2-1987（R1999）, 7/8-9

Carbon steel with zinc plating, compliant with ANSI/ASME standards, thread precision matching 7/8-9 bolts, good anti-rust performance for general industrial use.

1. Thread wear from repeated disassembly; 2. Zinc coating peeling leading to rust; 3. Sliding from over-tightening.

1. Avoid excessive disassembly; 2. Protect from scratches to maintain zinc coating; 3. Tighten to standard torque.

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NB800M.24.12A

Q355B carbon steel, precision machining, surface anti-corrosion coating, high structural strength to withstand connection loads.

1. Bolt hole deformation from excessive torque; 2. Corrosion from environmental exposure; 3. Weld cracking (if applicable) from vibration.

1. Control bolt torque to avoid overloading holes; 2. Maintain anti-corrosion coating; 3. Inspect welds (if any) for cracks regularly.

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NB800M.24.13.00A

Q235B carbon steel, welded structure, surface galvanized for anti-rust, lightweight yet strong enough to support auxiliary loads.

1. Deformation from excessive load; 2. Rust from humid environments; 3. Weld failure from vibration.

1. Ensure load is within rated limits; 2. Touch up galvanized coating if damaged; 3. Secure firmly to avoid vibration-induced stress.

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Can I replace ANSI/ASME standard bolts with non-standard ones?

No. ANSI/ASME bolts (e.g., 7/8-9×2 3/8) are engineered for specific load-bearing and compatibility. Non-standard bolts may cause mismatch, breakage, or leakage, violating safety standards and risking equipment damage.

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How to choose between R35 and R44 gasket rings?

They are application-specific: R35 (2 pieces) is for medium-diameter joints, while R44 (1 piece) is for large-diameter connections. Replace with the exact specification (NB800M.24.04A/R35 or NB800M.24.09A/R44) to ensure sealing and fit.

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Why are two types of double ends bolts used in the assembly?

The 1 1/8-8UN (NB800M.24.05A) and 1 1/2-8UN (NB800M.24.07A) bolts differ in size and load capacity, matching different connection points. Using the correct type ensures each joint bears load appropriately, preventing structural failure.