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{"title":"S30408 Necked-In Elliptical Head (EHA 450\u00d72.5) \u2013 Compact & Leak-Proof for Small","imgUrl":"https:\/\/img.chinax.com\/nimg\/31\/e5\/ec501675946ba248d875976ca945-200x200-1\/s30408_necked_in_elliptical_head_28eha_450_c3_972_5_29_e2_80_93_compact_26amp_3b_leak_proof_for_small.jpg","attrs":{"Brand Name":"GJ","Model Number":"EHA 450x2.5","Certification":"ASME, PED, GB, ISO","Place of Origin":"Henan, China"}}
{"title":"S30408 Stainless Steel Ellipsoidal Head Cold Pressing Cryogenic Tanker Pressure","imgUrl":"https:\/\/img.chinax.com\/nimg\/04\/f1\/6f91edb02f1929d9807e1b209a95-200x200-1\/s30408_stainless_steel_ellipsoidal_head_cold_pressing_cryogenic_tanker_pressure_vessel_heads.jpg","attrs":{"Brand Name":"Guojiang","Model Number":"EHA 1700\u00d710","Certification":"ASME, PED, GB, ISO","Place of Origin":"Henan, China"}}
{"title":"SUS304 Precision Sealed Head with 800mm Inner Diameter and 4mm Wall Thickness","imgUrl":"https:\/\/img.chinax.com\/nimg\/6d\/40\/518cdace9c18b4a7966a669da615-200x200-1\/sus304_precision_sealed_head_with_800mm_inner_diameter_and_4mm_wall_thickness.jpg","attrs":{"Brand Name":"GJ","Model Number":"EHA 800\u00d74","Certification":"ASME, PED, GB, ISO","Place of Origin":"Henan, China"}}
{"title":"High-Precision S30408 Ellipsoidal Head 3300\u00d79 - Stable Pressure-Bearing, Multi","imgUrl":"https:\/\/img.chinax.com\/nimg\/20\/89\/fed33f61cee359ca94e8e6c25a92-200x200-1\/high_precision_s30408_ellipsoidal_head_3300_c3_979_stable_pressure_bearing_2c_multi_industry_export_choice.jpg","attrs":{"Brand Name":"Guojiang","Model Number":"EHA 3300\u00d79","Certification":"ASME, PED, GB, ISO","Place of Origin":"Henan, China"}}
{"title":"3800 ID S31603 EHA Ellipsoidal Head - Stable Pressure-Bearing, Multi-Industry","imgUrl":"https:\/\/img.chinax.com\/nimg\/aa\/03\/5143ca8a279e5bb5c79d232fedfc-200x200-1\/3800_id_s31603_eha_ellipsoidal_head_stable_pressure_bearing_2c_multi_industry_export_choice.jpg","attrs":{"Brand Name":"Guojiang","Model Number":"EHA 3800\u00d718","Certification":"ASME, PED, GB, ISO","Place of Origin":"Henan, China"}}
{"title":"Ellipsoidal Dished Head 2250\u00d712 Internal Top Head for Electronic Industry Gas","imgUrl":"https:\/\/img.chinax.com\/nimg\/31\/62\/85322c124a2d583546b06bbc6fc8-200x200-1\/ellipsoidal_dished_head_2250_c3_9712_internal_top_head_for_electronic_industry_gas_cylinders.jpg","attrs":{"Brand Name":"Guojiang","Model Number":"EHA 2250\u00d712","Certification":"ASME, PED, GB, ISO","Place of Origin":"Henan, China"}}
{"title":"Stainless Steel Outer Tank Ellipsoidal Head, Partial Polishing, Size: 2500\u00d76","imgUrl":"https:\/\/img.chinax.com\/nimg\/ff\/34\/6b54c573a86a6ccdb2020822e105-200x200-1\/stainless_steel_outer_tank_ellipsoidal_head_2c_partial_polishing_2c_size_3a_2500_c3_976.jpg","attrs":{"Brand Name":"GJ","Model Number":"EHA 2500\u00d76","Certification":"ASME, PED, GB, ISO","Place of Origin":"Henan, China"}}
Wooden cases, wooden pallets, steel pallets, or customized according to customer requirements
Diameter
76mm - 10000mm
Thickness
1mm -300mm
Roughness
RA 0.1-0.8μm
Feature
Necked-in
Downstream Aplications
industrial Dewar flask heads,on-board gas cylinder heads,quick-cooling storage tank heads,on-board storage tank heads,heads for food and medical equipment, ,water purification filter pipeline end cap，and heads for magnetic resonance equipment.
Wooden cases, wooden pallets, steel pallets, or customized according to customer requirements
Diameter
76mm - 10000mm
Thickness
1mm -300mm
Roughness
RA 0.1-0.8μm
Feature
Necked-in
Downstream Aplications
industrial Dewar flask heads,on-board gas cylinder heads,quick-cooling storage tank heads,on-board storage tank heads,heads for food and medical equipment, ,water purification filter pipeline end cap，and heads for magnetic resonance equipment.
Henan Guojiang is a leading domestic manufacturer of precision pressure vessel components, with over 12 years of experience in R&D, production and customization of dished heads. Its products are exported to more than 10 countries and recognized by customers. In the field of special heads for small and medium-sized equipment, it consistently adheres to high standards of reliability and precision, accurately meeting the rigorous operational requirements of global small and medium-sized fluid equipment.
2. Core Product Specifications
Inner Diameter: 450mm, customized for storage tanks of small and medium-sized fluid equipment, perfectly matching the tank structure for storage and transmission of media such as water and chemical solutions.
Specification: 450×2.5, designed based on the low-pressure working conditions (0.1MPa-0.6MPa) and medium circulation characteristics, with thickness adapting to the pressure-bearing needs of light-duty equipment.
Material: S30408 stainless steel (equivalent to 304 stainless steel), containing 18% chromium and 8% nickel, featuring excellent corrosion resistance in acid-base medium environments without impurity precipitation.
3. Core Advantages of Necked-In Design + Manufacturing Process
Exclusive Advantages of Necked-In Structure
Enhanced Sealing: The necked-in design ensures a tighter connection with the tank body, reducing the risk of medium leakage and adapting to the sealing requirements under low-pressure working conditions;
Optimized Flow Guidance: The necked-in shape guides the smooth flow of media, avoiding residue accumulation and improving equipment operational efficiency;
Easy Assembly: Precise necked-in dimensions facilitate quick docking with pipelines and valves, reducing installation difficulty and improving assembly accuracy;
Compact Structure: Compared with ordinary heads, the necked-in design saves installation space, adapting to the compact layout needs of small and medium-sized equipment.
Manufacturing Process
Adopts cold pressing forming technology, avoiding high-temperature damage to the corrosion resistance of the material. Ensures the head maintains stable structural rigidity and sealing performance when in long-term contact with various media, with a smooth surface free of cracks and wrinkles.
4. Quality Assurance
Inspection Protocols: 100% full inspection, including Ultrasonic Testing (UT), Liquid Penetrant Testing (PT) and dimensional accuracy testing, eliminating defective products;
Applicable Standards: Compliant with GB/T 25198-2010, ASME BPVC Sec.VIII Div 1 and ISO 13445;
Certifications: Holds ISO 9001:2015, ISO 14001:2015 certifications and ASME "U" Stamp approval, with traceable and compliant quality.
5. Application Scenarios
As a core component of small and medium-sized fluid equipment, the necked-in design makes it more suitable for:
Laboratory precision filtration equipment for chemical solutions
Small-scale food and beverage processing filtration tanks
Small-scale purified water storage equipment in the pharmaceutical industry
6. Packaging & Customization
Packaging: Uses export-grade fumigated wooden crates with shock-absorbing foam and moisture-proof membranes inside, ensuring no damage or moisture during transportation;
Customization Services: Supports customization of inner diameter from 76mm to 10000mm and thickness from 2mm to 300mm. The size and angle of the necked-in part can be adjusted according to equipment requirements to adapt to different scenarios.
7. Product Features
Strong Corrosion Resistance: S30408 material is suitable for various acid-base media, extending equipment service life;
Hygiene Compliance: Surface roughness Ra ≤ 0.8μm, meeting food-grade and industrial-grade hygiene standards;
High Cost-Efficiency: Optimized design of 2.5mm thin specification reduces material consumption and equipment manufacturing costs;
Wide Compatibility: Compatible with mainstream domestic and foreign small and medium-sized fluid equipment models, and the necked-in structure adapts to multi-scenario installation needs.
