Is the Screw with GW NPT stainless steel, 104H suitable for use in nuclear power applications and does its AISI 316 composition meet relevant regulatory standards?

Screw with GW NPT stainless steel, 104H . based on the provided description . is primarily intended for use in the nuclear power industry and is made of AISI 316 stainless steel. AISI 316 (marine grade, containing molybdenum) offers good corrosion resistance and is commonly used in energy and nuclear-related applications where resistance to chloride-induced corrosion and good mechanical properties at elevated temperatures are required. Whether this specific Screw with GW NPT stainless steel, 104H is suitable for a particular nuclear power application depends on regulatory and project-specific requirements. Nuclear applications typically require components to meet strict standards (e.g., ASME Boiler & Pressure Vessel Code, ASTM specifications, national nuclear regulatory body approvals) and often demand traceability, material certification (e.g., mill test reports to ASTM A182/A276/A312 as applicable), heat treatment records, and sometimes qualification testing for radiation, high temperature, or seismic conditions. AISI 316 by itself can meet many industrial standards, but compliance must be verified: obtain material certificates, confirm the screwâs manufacturing and testing to the applicable nuclear codes, and ensure any necessary nuclear-grade qualification and procurement controls were followed. Without documented certification and explicit code compliance, you should not assume suitability for safety-critical nuclear applications.

Can the Screw with GW NPT stainless steel, 104H withstand long-term exposure to aggressive chemical environments used in pharmaceutical and petrochemical plants?

Screw with GW NPT stainless steel, 104H, made of AISI 316, offers good general corrosion resistance and is suitable for many chemical, petrochemical, pharmaceutical, energy and process engineering applications as stated. However, long-term exposure to aggressive chemical environments common in some pharmaceutical and petrochemical plants (strong acids, chlorides, halogenated solvents, hydrogen sulfide, high-temperature caustics) can cause pitting, crevice corrosion or stress corrosion cracking in 316 stainless. For truly aggressive or high-chloride conditions, higher-alloy materials (e.g., duplex, 316L with proper heat treatment, or superaustenitic/superduplex grades) or additional protective measures are recommended. Final suitability requires site-specific corrosion assessment, knowledge of media, concentration, temperature, pressure and exposure time, and should be confirmed with corrosion engineers or manufacturer.

Does the Screw with GW NPT stainless steel, 104H meet seawater corrosion resistance requirements for marine applications?

Screw with GW NPT stainless steel, 104H, made of AISI 316 (EN X5CrNiMo17-12-2) offers good general corrosion resistance and is commonly used in chemical, petrochemical, pharmaceutical, energy and process industries. For marine applications and seawater exposure, considerations are: - General suitability: AISI 316 has improved resistance to chloride-induced pitting and crevice corrosion compared with 304 stainless steel, so Screw with GW NPT stainless steel, 104H will perform acceptably in mildly aggressive coastal environments and for short-term or intermittent seawater exposure. - Limitations in seawater: Standard 316 is susceptible to pitting and crevice corrosion in warm, stagnant, or highly oxygenated seawater, especially under sustained immersion, high chloride concentration, or if deposits/crevices form around threads and fittings. Stress corrosion cracking can occur in chloride-rich environments under tensile stress. - Marine-grade alternatives: For prolonged, continuous seawater service (offshore, submerged, splash zone, hull fittings), duplex stainless steels (e.g., SAF 2205), Super Duplex, or higher-alloyed steels (e.g., 316L with careful design, 904L, or nickel alloys like 6Mo) provide markedly better seawater corrosion resistance than standard 316. - Practical recommendations: If using Screw with GW NPT stainless steel, 104H in marine settings, specify 316L (lower C) or consider additional protections: cathodic protection, protective coatings, regular maintenance/inspection, avoiding crevices, and attention to thread sealing to prevent trapped seawater. For critical or long-term submerged applications, choose a more resistant alloy. Conclusion: Screw with GW NPT stainless steel, 104H (AISI 316) can be acceptable for limited or mild marine exposure, but it does not reliably meet stringent seawater corrosion resistance requirements for continuous, aggressive, or critical marine applications without additional mitigation or a more corrosion-resistant alloy.

Screw with GW NPT stainless steel, 104H

All products, Precision threaded fasteners/

Additional information

Material	SS – stainless steel

NPT threaded coupling, type 104H, primarily intended for the chemical, petrochemical, pharmaceutical, energy, nuclear power, and process engineering industries. Material: AISI 316 steel.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HM-P104H-02-SS	Fitting 2 x G 1/8" NPT, SS	-	448	In stock	Enquiry
HM-P104H-04-SS	Fitting 2 x G 1/4" NPT, SS	-	455	In stock	Enquiry
HM-P104H-06-SS	Fitting 2 x G 3/8" NPT, SS	-	366	In stock	Enquiry
HM-P104H-08-SS	Fitting 2 x G 1/2" NPT, SS	-	338	In stock	Enquiry
HM-P104H-12-SS	Fitting 2 x G 3/4" NPT, SS	-	317	In stock	Enquiry
HM-P104H-16-SS	Fitting 2 x G1" NPT, SS	-	303	In stock	Enquiry

Do you need a larger quantity of products or a bespoke quote?

Call us: +48 61 653 02 22 or email us: tubes@tubes-international.com

SEND ENQUIRY

NPT threaded coupling, type 104H, primarily intended for the chemical, petrochemical, pharmaceutical, energy, nuclear power, and process engineering industries. Material: AISI 316 steel.